20 Darkness had settled down upon Brent Rock, following the departure of Locke, when a trim runabout drew up under the Port Cauchere and Dora stepped lightly out of it. She paused for a moment and looked about curiously. For some time she hesitated. In this house lived the girl whom in her heart Dora hated bitterly. What sort of reception might she expect? Yet Paul and his underworldlings had played on Dora's pride until they had prevailed on her to undertake the mission. As she looked about all her old assurance came back to her and Dora turned and approached the door boldly. Ava was just about to go upstairs to her room when she heard the butler at the door and a woman's voice asking whether Miss Brent was at home. Ava paused a moment. There was evidently a slight altercation between the butler and the newcomer as the latter raised her voice sharply. "'You will tell Miss Brent I must see her,' reiterated Dora. There was a pause during which the butler was heard to murmur something and then the woman's voice was heard again. Tell Miss Brent that if she refuses to see me she will regret it all her life.' Ava was intensely interested now for she recognized the voice of deluxe Dora. But with her interest there came a feeling of repulsion with which this woman always inspired her and her first impulse was to have Dora shone out of the house. The very nature of the danger with which they were all surrounded, however, prohibited such a drastic course. Yet how dare that woman enter Brent Rock? Still the very fact of her so daring pointed to some serious matter which Ava felt she ought to know. At any rate there could be no harm to listen to Dora's reason for coming, and there would probably be much to be learned. Ava called to the butler and he stepped aside, and Dora, all smiles now and with her hand extended in greeting, advanced toward Ava who ignored her extended hand. "'Need I tell you,' remarked Ava coldly, that I am astounded at your presumption in coming here?' "'Miss Brent,' replied Dora, "'believe me, nothing but my present mission could have induced me to do so. There are wheels within wheels which have made it appear that I am your enemy. But that is far from being the truth, as my present mission to you will prove.' Dora was clever and played her cards cleverly. However, Ava was on guard. "'Please come to the point,' she insisted, "'tell me exactly why you have come.' Dora paused a moment, then replied impressively, "'I have come to save your father's life.' Ava caught herself almost gasping in astonishment as Dora covertly watched the effect of her words. "'You have the antidote, then?' asked Ava breathlessly. "'Not exactly that,' replied Dora quickly. "'But I can take you where you can obtain it. A man has arrived from Madagascar who has it in his possession.' "'What shall I do?' almost wailed the poor girl. "'How can I know that you speak the truth?' Dora's voice now assumed a cold decisiveness. "'That is for you to decide,' she said merely.  Consent, and he may live.' Ava could hesitate no longer. Bidding Dora wait, she ran up the stairs, returning in a few moments garbed for the street. They left the house together, but not before the butler had surreptitiously slipped a large automatic into Ava's handbag. In the Chinese temple, or Joss House, the last devotee had departed. The hanging lights had been dimmed, and now the fantastic shapes with which the place was decorated, seen in the subdued light, stood out in all their shadowy weirdness. From the raised days the seven-handed god assumed an added majesty and awfulness, while deep-seated as though from a smoldering cauldron two points of fire gleamed from the god's eyes with utmost malevolence. Slowly a panel in the wall slid back, and the bestial visage of the strangler peered out. After making sure that there was no one about, with noiseless tread he glided into the temple. Like a shadow, a second figure, that of a Chinaman, followed him. The two made a complete circuit of the temple, stopping now and again to examine some object which arrested their attention. Then as if by a prearranged signal they both prostrated themselves before the fire god. After making many obeisances they got to their feet, and as mysteriously as they entered, slipped away in the same manner that they had come. A panel closed behind them, but not the same panel. The inner room in which they now found themselves was divided by a partition that extended a few feet out into the temple-room itself. This room was vividly painted with weird figures depicting Chinese forms of torture, a veritable charnel-house of what in Europe would be called the Dark Ages. There were plenty of evidences that at no very distant date this chamber had been in use to punish horribly those who had offended against the fire god or the commands of the Tong leaders. On one side of the partition was a large iron wheel to which was attached a rope extending through the partition and forming a loop or noose on the other side. The purpose of this device was only too apparent. Once the neck of a victim was in the noose, a few turns of the wheel the noose would tighten and the victim would be inevitably strangled to death. In a slightly changed form it was the garating machine of old Spain. The strangler tested the rope, twisted the wheel, while his companion occupied himself by watching the effect of the wheel on the noose on the other side of the partition. Apparently satisfied that the machine was in good working order, the Madagascan straightened up and waved his companion out of the room. The Chinaman returned by means of the sliding panel into the temple again. As she left Brent Rock behind, Ava's fears increased. Speeding through the night with this woman whom she instinctively dreaded, whom she had every reason to distrust, many times on the trip Ava wished herself back at her home. On the other hand, to remain inactive while there was a chance to save her father's life, was unthinkable. And so, for his sake, she kept on and the car sped ahead. Dora, on the contrary, anxious to allay Ava's fears, was very valuable, expressing many sentiments which even to a young girl of littleworldly experience were palpably at variance with the woman's character. In and out of the narrow streets of the city's lower quarter the car twisted and turned, and at last entered gaily-decked Chinatown where it came to a halt. If Ava was afraid before, she was now doubly so. The strange oriental faces which seemed to leer at her from street and curb seemed to be almost of another world, and she thought of the many tales she had heard of their treachery and cunning. Dora, sensing what was passing through her mind, kept up a patter of small talk as she urged Ava forward. By another entrance than the one that led through the Chinese curio shop, they entered the Joss House and came to the worshiping-room of the temple. Ava gazed fearfully about her now at all the fantastic decorations with which she was surrounded. Her only comfort was the handle of the automatic that the butler had pressed on her as she was leaving home. "'This Madagascan with the antidote,' asked Ava tremulously, "'where is he?' "'Don't worry, dearie,' quieted Dora. "'Wait a moment here, and I will bring him.' Dora turned on her heel and left the temple by the door leading into the beautiful lounging-room beyond. Dora stood transfixed by the solemn awfulness of the place and the grim visage of the fire-god. Why had she been brought to such a place? What new terrors awaited her here?' She seemed alone, yet was she? She felt a thousand eyes regarding her, as though a thousand dangers lurk to destroy her just beyond those fearful walls. She was staring now at the god. What made his eyes gleam so banefully? She thought she heard a sound. Was the wall at the right of the statue moving, or was it merely her heightened imagination? Fascinated, she watched. Yes, she was sure now.  Now she saw a hand. Then an arm followed. With a slow, gliding movement that even to Ava's strained ears was noiseless, a man, his back toward her, slid into the room. Ava, shrinking back, wanted to shriek. But instead she whipped out the automatic, and in an instant had the man covered. The man was still evidently unconscious of her presence. But suddenly he must have heard Ava move, for he wheeled around, and instinctively his hands went above his head. As for Ava, the cry that she had suppressed at his appearance was suppressed no longer, for the man whom she held at her mercy was lock! How did you come here, gasped Ava? Hurriedly he told her his story, how he felt that the clue that he would lead to the unraveling of this mystery was now to be found in Chinatown, how he had made his way, therefore, to the Chinese quarter, how he had tracked the Madagascan. Knowing the futility of trying to enter any private place of the titles, much less their temple, in Occidental garb he had waylaid a Chinaman in an alley, had stripped him, and had changed clothes with him. Disguised thus, lock had managed to enter, to observe, and was only now on his way to summon assistance. For he had decided to have the place raided. Only now he was stricken almost dumb with astonishment at being confronted by Ava. There was no time for more. Before Ava could explain her own presence there, the door burst open, the panel slid back, and a horde of emissaries and Chinaman swarmed about them. Ava fired her automatic again and again, but could not stay the rush. Lock fought with the courage of despair, but they were too many and soon bore him down. As they carried Lock into the chamber of torture the last thing he saw was Ava surrounded by her foes who were closing in on the poor girl. Towering above them all he saw the gigantic form of the automaton. In the torture chamber Lock was shackled hand and foot to the partition while the noose of the garoting machine was placed about his neck. The Madagascans supervised this work, then waved the emissaries out of the room. They were alone there now, these two, the professional murderer and his victim. With a sneer the Madagascan turned and went to the other side of the partition where the wheel was by which the noose was tightened strangling the victim. But the strangler little knew with whom he had to deal, for already Lock was struggling at his shackles. With almost incredible dexterity Lock succeeded in loosening them, one after the other, so that as the Madagascans started to turn the wheel Lock, with a marvelous effort, bracing his feet against the wall and grasping the staples to which the shackles had been attached, managed to pinwheel his body around and around as the strangler turned the iron wheel that tightened the noose which was to stifle out his life. Fortunately the Madagascan turned slowly so that Lock managed to turn his body faster than the wheel was being turned, thus gaining on the noose and at each revolution loosening at a trifle. Another quick turn of his body, the pressure against his neck had become less.  It was the work of only an instant to dash around the partition and beat the strangler to the floor. Another instant, and he had torn back the panel into the temple. The sight that confronted him was sickening. Two fiends were holding Ava close to the floor, while now from the fire-god's eyes a blinding glare of flame blazed forth the two rays converging and scorching the very ground as they traveled slowly nearer and nearer in their fatal focus to the helpless girl. With a wild shout Lock charged on them all. Taken by surprise the brutes holding Ava were easy to handle, for the others had gone. Finally the automatic which Ava had been carrying was lying, neglected on the floor. Lock snatched it up and shooting one of the thugs managed to cover the other. Half supporting Ava he retreated through the torture chamber into an outer room. There was no time to lose. Already the alarm had been spread to the other emissaries and Chinaman, and it was only a matter of seconds when all the murderous crew would again be piling after them. Lock looked about in desperation. There was a window. He flung it open. Below the air-shaft or court was blind. But there was a balcony by which he could reach an adjoining low roof. He had no idea where it might lead, but any unknown danger was preferable to the known dangers that threatened behind him. Through the window he passed with Ava and so across balconies and roofs until they came to a fire escape which they descended. In another moment they were free of Chinatown. Many a curious glance was cast at them, a young girl, well-gowned and a dishelled white man in Chinese garb. Lock hailed a night-hawk cabman and they were soon speeding on their way back to safety and Brent Rock. At the Cove Fishing Village, set on the extreme outskirts of the town, there stood an old fisherman's shack that was shunned by all the good folk of the city. While there was nothing definite that could be said of the evil deeds of the inhabitants, there was much shaking of heads and wagging of tongues to the effect that all was not as it should be at the Cove. The owner of the old shack, old Tom, was an ill-favoured, taciturn man who would have not to do with any of his neighbors and asked only that they keep out of his path and leave him alone. He even evinced an aversion to dogs and to little children, driving them away from his shack whenever he found them near it. The threat that old Tom will catch you would make a Cove Fishing Village tractable at any time. Old Tom rarely put to sea and when he did it was more often than not after nightfall, a time when the good folk of the village were preparing for a night's rest. It was stated by one old crony that often at night other men came to old Tom's shack, that they entered slyly, and that well into the morning revelry and often oaths and brawls could be heard from within. Some hinted that old Tom was a smuggler, others even that he was a wrecker. True it was that often strange lights were seen to flicker outside the bar to the Cove. Also there had been wrecks, and often in the morning when the fishermen put out to a wreck after a storm it would be discovered that someone had been there before them, since valuable and readily portable parts of the wreck were frequently missing. But while suspicion pointed to old Tom and the strange men that frequented his place, proofs positive of a crime were invariably lacking, and so the village tolerated old Tom's presence and predicted his bad end. It was to this shack that there came very early one morning, before the break of day, a wounded man assisted by a woman. The woman gave a peculiar wrap at the door. There was a quick scurry inside, as of fast-moving feet, then silence. The woman wrapped again, and this time with more force. After a moment a sash was raised, and a quarrelous voice demanded what was wanted. It's Deluxe Dora and Paul Balcom, and he's wounded. Quick, open the door! There was a rush to open the door now, and rough hands gently assisted the wounded man to a seat inside. While Paul was not perhaps so dangerously wounded, yet it was easy to be seen that the wound was not to be trifled with, for the cut had been severe, and the blood flowed copiously. Dora, whatever her attitude toward others, had a true solicitude for Paul, and all the womanliness of her nature came to the surface as she tenderly bathed Paul's head, and attempted to bind the wound with the rough bandages at hand.  What was this strange power that this man, scarcely more than a youth, wielded over these outlawed men? Quick, exclaimed Dora, watch the window! We've probably been followed! A grim-visaged man moved lumberingly over to the window and glued his head against the pane, straining his eyes as he peered out. For a long time he did not move, while with the others grouped around, Dora tried to staunch the flow of blood from Paul's injured head. Suddenly the watcher at the window turned and shouted, Man, coming up the lane! Instantly there was confusion within the shack. The men scattered in all directions, while one old hag, the only woman in the shack besides Dora, hobbled over to a stool and took up the mending of a huge net where she had left off. Old Tom ambled over to Dora and for a moment they talked hurriedly. Finally Dora came to a decision as she pointed to the old rickety stairway to an attic above. Carry him to the attic, she directed. He can be well hidden there. As for the rest of you, remember, no one has come here tonight. Two of the men lifted Paul, who, while not in an absolutely unconscious condition, was much too weak by this time from loss of blood to a system self. They carried him up the stairs and into an old, disused room to which Dora followed, and when the two men had descended the stairs she remained, alternately ministering to Paul and listening for what might happen below. Paul and Dora had left the main room of the shack not a moment too soon, for barely had the two men who had carried Paul to the attic returned when a face was momentarily seen outside, while a pair of eyes peered into the room. A moment later there was a peremptory knock at the door. "'Come in,' growled old Tom, with eyes that scanned every cranny and nook and searched every face, Locke stepped into the shack. The men came forward a step, then halted. There was something in Locke's face that showed that he was in deadly earnest and not to be trifled with. Locke looked from one to the other, then turned to old Tom. "'The wounded man who was brought here,' he demanded. "'Where is he?' "'There ain't been no wounded man brought here,' retorted old Tom. The men crowded a little closer, all denying vehemently that any one had entered. At this instant a drop of blood fell on Locke's sleeve from the ceiling above. Quickly he checked the impulse to look up, although he was startled by it. He recovered himself on the instant, and waited until under a pretext he could divert their attention to something else. Then he glanced hastily upward as they looked in another direction. There forming slowly was another drop of blood, and it was about to fall. Locke had gained his object. As surely as though he had been brought face to face with Paul, he knew that he was lying on the floor of the attic above. Still handed, against so many and in this shack, Locke realized that he could do nothing. He apologized gruffly for his intrusion, conveying the impression that he felt he had made a mistake, and backed his way to the door. In an instant the door to the attic stairs was flung open and Dora rushed into the room. "'You fools!' she snarled at the surprised men who were just congratulating themselves on how they had put one over on Locke. "'I tell you, he's wise. He saw the blood. Look up above you. Now go get him!' But the fisherman had no desire for this outside work and hung back while Dora raved at them. From the ceiling, drop by drop, blood was falling, forming a little pool on the floor. Paul could not be moved now. They must make the best of it and be ready for any raid Locke might prepare. At Brent Rock Ava was conversing with her lawyer. Matters had reached such a state in the affairs of international patents that it was evident, even to her, that some drastic action must be taken and at once. In a corner of the room, coiled up in a big arm-chair, Zeta was apparently reading a new magazine, but was in reality listening intently to every word that was being uttered. Finally, Ava and the lawyer were in full accord, and she accompanied the elderly attorney to the door. As they parted, Zeta strained her ears to hear the last words.  As my lawyer, she overheard Ava say, I wish you to have Mr. Locke appointed receiver. There was some more, she missed, but that was quite enough for Zeta. She got out of the chair quickly and left the room without being observed, and a few moments later she had left the house. In a telephone booth, not far from the cove fishing village, Locke by this time had his chief of the Department of Justice on the wire. I've located him, chief," he telephoned excitedly, but it will take four good men to capture him. I'll send them at once," the chief replied, as both hung up their receivers hurriedly. Meanwhile, in Herbert Balcom's sumptuous, semi-oriental apartment, two men were in earnest conversation. One was the owner, Balcom, the other, that strange, half-demented being Dr. Q, whose mind now, for the moment, seemed to be lucid. The matter under discussion was undoubtedly a weighty one, for both men sat with knitted brows, and for the moment, at least, seemed in a quandary about something. Suddenly there came a hurried ringing at the outside door-bell, and Balcom leaped to his feet. They could hear the door open, quick footsteps in the hallway, and then, without ceremony, the door was flung open and Dora burst into the room. Balcom scowled a welcome, for he hated this woman, who had, as he thought, spoiled the chances of his son with Eva. But Dora did not wait for the threatened-out burst. Harry, she cried, you must do something. Paul has been wounded. Never mind how, but he lies in a fishing-shack down at the cove, and they are going to arrest him. Lock is. For the moment, both men seemed to be stricken dumb, while Dora, in a state of wild excitement, pleaded for them to do something, anything to save the one person she loved. It was at this juncture that the door opened again, admitting another woman. It was Zeta, very agitated, though, of course, under better control than Dora. Besides, Zeta did not know what had happened to Paul, nor did she love him. It was merely that she felt that things could be made to play into her own hands if the news she brought were immediately acted upon. Hastily she told what she had overheard about the proposed receivership, and all four now, Balcom, Dr. Q., Dora, and Zeta, talked excitedly. But it was plainly Balcom who was in command of the situation. Although livid with rage at the news he had heard, yet he maintained control of the others, directing what they should do with the decisiveness that was truly remarkable. It showed the mental force of the man, demonstrating how greatly he was to be feared by any bold enough to be his enemy. For Balcom loved that spoiled son of his, and would hesitate at no act, not even at a crime, to save him from even what he justly deserved. At last their plan was formed, and all four departed their several ways to execute it. Balcom had decided upon going directly to Brent Rock. His ire had not abated one iota during the trip, either, and as he almost ran up the steps to the mansion he pushed the astounded butler on one side as though he were merely a piece of furniture. "'Tell Miss Brent I want to see her at once,' he threatened. The butler raised a hand deprecatingly at Balcom's tone, but Balcom, beside himself, smashed it down and strode toward the library, just as Ava, hearing the voices, was coming out. For an instant she drew back in apprehension and amazement, as Balcom advanced on her, still snarling. "'See here, Ava,' he hissed. "'If Locke tries to arrest my son, he'll be killed.' For the instant Ava was stunned. What did the man mean?' But as Balcom showed no signs of regaining control of himself, and every moment became more abusive and violent, indignation gave place to every other sentiment, and she sharply ordered Balcom to leave the house. Threatening dire things and hinting even more if there were a receivership, Balcom strode out. Ava stood for a long time, shocked into inaction. Then slowly, fears for Locke's safety came uppermost, and she paced back and forth the length of the hall. Finally the old butler came to her deferentially. "'And did you notice, ma'am?' he asked, that during his tirade he mentioned about a cove fishing village? Did I suggest that that is where Mr. Paul is, and Mr. Locke will not be found far off?' Ava thought a moment, recognized the sound sense of the remark, and ordered that her car be brought. A few moments later she had taken the wheel and was soon out of sight of Brent Rock. Close pressed against a wall of a back lane of the cove fishing village, Locke was standing, waiting for the men whom his chief had promised to send. Finally they came to him, first making their coming known to Locke by a peculiar low whistle. "'The other two will be along directly,' whispered one of the pair. Thought it better not to come in a bunch.' As Locke laid his plans the other two came from out of the shadows. The entire party now moved cautiously toward old Tom's shack. Just before they arrived one of the men said that he could see two figures entering the place. But as Locke had seen nothing no attention was paid to the remark. Locke now placed one of his men on either side of the door. The other two he sent to the rear so that they could surround the gang. He knocked at the door. This time it was immediately opened. Armed by the detectives, with revolvers drawn, Locke rushed boldly into the shack while his other two men closed in from the rear. The emissaries, finding themselves surrounded, would have catapulted, probably without a struggle, had not the old hag, to whom no one had paid much attention, picked up a small anchor and thrown it at Locke and the advancing detectives. As it was, the anchor struck Locke a glancing blow and he stumbled backward against one of his own men, upsetting him. That of course gave the advantage to the thugs and they advanced attacking savagely. It was at two close quarters in the midst of such a melee to use guns without danger of getting one of one's own party. Thus it was a primitive battle of brute force. Locke and the detectives were trained men, however, and were surely gaining the upper hand, so much so that Locke managed to tear himself loose and dash for the door leading to the attic. He opened it and there, with revolver level at his head, stood Deluxe Dora. It was the work of only an instant to disarm her, however, and he rushed up the stairs, Dora after him. There was a body lying on the floor, Paul undoubtedly thought Locke. He took it by the shoulder and turned it over, then fell back in amazement, for there, smiling mockingly at him, was Zeta.  But it was no time to bandy words and Locke left them and rushed down the stairs just as a horde of emissaries swarmed up to meet him, reinforcements to the Fisher Thugs. For in some way the automaton had been warned of Locke's presence, and with all the emissaries it could summon had hastened to old Tom's shack. Most unfortunate of all, the automaton and its men had arrived just behind the car bearing Ava, and she, not suspecting the danger, had entered the shack. Although she did not see Locke, she was overjoyed to see that the detectives held the upper hand. She had started to search for him when there came a terrifying crash at the door and more emissaries, followed by the automaton, came into the room. The detectives were almost instantly overpowered and the mob made for the stairs just as Locke was descending. In that narrow space a most terrible battle took place. Man after man Locke hurled against his fellows, and they went crashing down only to rise again and attack. Finally they came to hand grips, and Locke, lunging furiously to free himself, threw his body against the partition of the stairway and a cane crashing down, hurling Locke and the emissaries to the floor below. Locke was badly stunned, and before he could rise the emissaries had swathed him in the huge net that the old hag had been mending. Next they bound him with ropes until he was utterly helpless in the meshes of the net. Ava, half crazed with horror, was in a far corner, and the automaton was advancing upon her. She was paralyzed with fear. What fate was in store for her? What for Locke? CHAPTER XXII The sharp crack of an automatic echoed through the shack. The detective known as Jim had come back to consciousness, and now, from behind an overturned table where he had fallen, he started to fire shot after shot into the mob of emissaries. He had fallen in a far corner, and could be reached only after an attack of some paces, and even the emissaries, numerous as they were, hesitated to advance on a determined man placed in such an advantageous position. Furthermore, the diversion caused by the shots had other effects. The sound of the shots brought Locke fully out of his stunned condition, and he started to struggle frantically in the meshes of the net that held him prisoner. The automaton, for the moment, ceased to follow Ava, and moved over to its men in order to take command and to direct their movements, while yet another detective came to his senses and began to threaten the mob. Locke was threshing about and was slowly but surely freeing himself. An emissary threw a chair, and for a moment Locke lay still in pain. But in another moment he was working even more frantically at the ropes and the net that held him. Ava started over to help him, but he shouted to her to stand back, since that would bring her in line with the detective's fire. The shots were flying over Locke's body as he struggled. Some of the emissaries went down, others found places of refuge behind which they hid. Finally, Locke managed to kick his feet free of the net, and rolling and tossing managed to work the meshes up about his shoulders and neck, thus releasing his hands. It was the work of an instant only now to slip the enveloping net over his head, and he was free. Locke rolled out of the direction of the revolver shots and toward Ava, who was now standing before a huge open fireplace. He was none too soon, for the moment that the automaton saw that Locke had escaped the iron terror, left the men and stalked ponderously over to crush out Locke's life. The two detectives fired point-blank at the monster, and both shots took effect with a ringing, metallic sound. But they did not halt the automaton an instant. Locke, reaching the fireplace, seized a pair of old tongs, and threw firebrand after firebrand in the path of the advancing terror. To the automaton fire was evidently quite another affair from mere puny bullets, for it not only paused but came to a full stop looking around as though in a quandary as to what to do against such a defense. This moment of hesitation gave Locke and Ava their opportunity. Calling to the detectives to cease firing a moment, they passed between friends and foes, dashed over to and up the attic stairs. As they reached the attic above they were just in time to see Zeta, still dressed in Paul's clothes, and Dora, jumped from the attic window. Although it was a low, rambling building, still it was a high jump, even for a man, and Locke was astounded that they should attempt such a thing, even in their undoubted state of panic. However it gave Locke a splendid idea, which he acted upon immediately. Hooking his feet on the window frame, he took hold of Ava's wrists firmly and swung her far out of the window. Held in this way Ava was only a few feet from the ground, and when Locke released her she landed safely and almost without a jar. For Locke, always in perfect training, the jump offered no difficulties. In an instant he had rejoined her and they were running away from the shack toward Ava's waiting-car. Locke had an almost overpowering desire to return to assist his detectives, whom he realized might be in sore straits, but he also realized that his first duty was to this girl who was in his charge, in whom the events through which they had just passed had had a nerve-wracking effect. Again he reflected, as he saw people coming down the beach, that the automaton and his men would soon be outnumbered and glad to flee. Quentin and Ava had almost reached the motor which Ava had left at some distance from Old Tomshack, and were passing a low clump of bushes when a low moan fell upon their ears. At first Locke thought that it might be a trap and was for paying no attention to the sound, but Ava, woman-like, insisted. He investigated, reclining on the ground and looking more like a little boy in man's clothes lay Zeta. She was holding one ankle, and her face showed that she must be in great pain. Help me! she moaned. When I jumped from the window I sprained my ankle. Dora helped me to this place, and then she left me and drove away. Although this girl was his enemy, no thought of leaving her in this condition entered Locke's mind. Gently raising her from the ground, with the help of Ava, Locke supported her to the car. Locke still held Zeta to ease her pain, while Ava took the wheel, and although they could hear shouts and even shots behind them, Ava drove slowly in order not to add to Zeta's misery. It showed the sympathy of their characters that much as Locke and Ava felt that Zeta had injured them, nevertheless pausing in a flight from deadly peril, they found it in their hearts to be kind to an enemy. Being at Brent Rock, they carried Zeta to her room and the family physician was sent for. He pronounced the injury slight and more of a strain than a sprain. While the doctor was at the house, he also paid a visit to Brent, who, while his mental condition had remained as apparently hopeless as ever, had gained much in strength, owing to the diet and restful care. He was now able to sit up, fully dressed. As it was a case of drug poisoning, the doctor had thought it best not to allow the patient to relax too completely. But whatever the strange drug that had stolen away Brent's reason, the effect showed no signs of departure and they were as much in the dark as to the antidote as ever. A few moments after the doctor had left, when he made his morning call the next day, the Council of the Corporation was announced. He was shown into the library immediately and it was there that Locke and Ava went into conference with him. The attorney had brought with him many shareholders' proxies and these he handed over to Ava. These proxies, he was declaring, give you absolute control, Miss Brent. With them you can force Mr. Balcom completely out of international patents. What's that you say? It was Balcom himself who spoke. How the man had got past the butler, who certainly had no love for him, was mystifying. Yet there he was, ready and eager to defend his interests. I was just telling Miss Brent, informed the lawyer, coldly, that with these proxies which I have obtained and just handed to her, she was in complete control of the company. And you, Mr. Balcom, interposed Locke, stepping forward, will play no further part in the activities of the company. Miss Brent desires your resignation to take effect immediately. Why, why, this is unheard of, absurd, sputtered Balcom. I'll, I'll—and his rage got the better of him. No, Mr. Balcom, again interrupted Locke, you will do nothing. It is I who will give you twenty-four hours to arrange your affairs with the company before I order your removal or arrest. Balcom tried to remonstrate, to plead his innocence of any wrongdoing. Having no sympathy by taking this attitude, his manner changed abruptly and he attempted to bluster. A decisive movement toward the telephone on the part of Locke checked this, and chameleon-like, Balcom's usual suave manner came to the fore. He bowed himself out. It will, of course, be as you say. He smiled, oilily. Once in the hall, however, his manner changed again, and, darkly scowling and biting his thin lips, he was about to quit the place, when Zeta, limping only slightly, intercepted him. Mr. Balcom, she pleaded, come out the back way. I must see you alone a moment. They tiptoed out to the grounds, and behind a hedge where they could not be observed from the house, talked. Tell me what has happened, demanded Zeta. Happened, repeated Balcom, why they've thrown me out of the company, at least they think they have. His mind was working quickly, and after a pause he turned to Zeta sharply. Can you get Brent out of the house and bring him to me here behind the hedge at eight o'clock tonight? Zeta nodded in eager acquiescence and left him returning to the house. That evening Locke, returning from a stroll around the grounds, noticed a movement in some shrubbery at the side of the footpath. He went closer to investigate, and a rough-looking individual broke from cover and ran away through the underbrush as fast as he could go. It was too dark to follow, and Locke hastened his steps to the house, fearing some new deviltry in the part of the automaton or his emissaries. He had just entered the darkened hallway when, much to his surprise, he saw the figure of a man leaning heavily on the arm of a woman descending the stairs. He stepped behind some portiers and waited until they reached the foot of the stairway. Then he stepped out and confronted them. Zeta gave a startled cry and would have fled had not Locke caught and held her. As for poor Brent, he simply stood there, swaying from side to side and smiling foolishly. Ava heard the commotion and came running down the stairs. She was amazed until Locke explained the situation to her. Then her indignation knew no bounds. Putting her arms around her father, she turned to Zeta.  For doing this you will leave this house immediately and never return. Zeta for a moment was on the verge of breaking down, but recovered herself and with an angry retort on her lips went out, slamming the door behind her. Zeta slipped around the house and to the hedge designated by Balcom as their meeting-place. She was surprised but relieved when she did not find him there and glanced at her wrist-watch, which stood at a few minutes past eight. She was about to turn around when she caught sight of a bit of paper. Taking it she read, Bring him to my rooms. That was all and the message was unsigned. Zeta greatly feared Balcom's wrath at her failure, but nevertheless she started for his apartment. At that moment Balcom and the mysterious Dr. Q were talking in the latter's dingy laboratory. Dr. Q's mind, for the time being at least, seemed perfectly clear and he had formulated a daring plan. Send Locke word that you will give yourself up, he was saying, but tell him that he must come to your apartment to get you. I will do the rest. Balcom left hurriedly and was driven directly home, where he got Locke on the telephone and repeated the instructions that Dr. Q had suggested. Am I to understand that you intend to turn State's evidence, questioned Locke doubtfully? Assuredly, hastened Balcom. Then I'll be right over. As Balcom hung up the receiver he chuckled sardonically. He was just turning to an antique brazier to arrange for Locke's reception when Zeta was announced and at once admitted. I've failed, Mr. Balcom, she apologized. Failed miserably. Locke took Mr. Brent away from me and they ordered me never to return to the house.  I'll not tolerate a failure either.   Outside she telephoned to Paul to see if she might induce him to use his influence in reinstating her in his father's good graces. As soon as Zeta was gone Balcom busied himself with the ancient brazier and was standing before a small image of Buddha. He took a small package and from it poured a powder into a bowl of the brazier. Then going to the table he wrote a short note after which he went to a divan and awaited Locke's coming. Balcom had not long to wait. A ring came at the door and Balcom leaped to his feet and lighted the powder in the brazier. Then he adjusted a gas mask that Dr. Q. had given him and returning to the divan lay down, pulling a camel's hair curlet well over himself as he awaited results. There was a wrap at the door and a peremptory demand for entrance, a pause and a whispered consultation outside. Open the door! cried Locke again. As there was no answer heavy blows were reigned upon the door and finally it gave way. Three men stumbled into the room. They stared about, then started to search the place. One by one they started to cough. Locke, who was the farthest away from the brazier, seemed to be the least affected. Finally he spied the note on the table and snatched it up. By the dim light he read, You will never live to capture me.  Locke gasped. There was the sound of a heavy fall behind him. He turned and saw that one of his men was down. He took a step forward, when the other pitched on his face. Locke tried to rescue them, but by this time the deadly fumes had reached him and he, too, fell to the floor, coughing his life away. At that moment Balcom got up from the die-van and, stepping over Locke's prostrate body, left the place, forgetting to close the door behind him. When Zeta telephoned Paul, Paul made an immediate appointment for her to meet him at Dr. Q's, and when she arrived there Paul was already in conference with the doctor. Over the telephone Zeta had already given Paul a brief account of what had happened, and thus the two men were prepared with a plan when she arrived. Get Ava to the hypnotists on River Street, instructed Dr. Q. Tell her that I have been hypnotized and that under the spell I will tell all. It was a desperate thing for Zeta to attempt, after treating the Brent so shamelessly, but there was no alternative, for she knew well that with Balcom only a success would offset her miserable failure earlier in the evening. Besides, were not her fortunes tied up with Balcom, or perhaps with Paul? She did not demure, but left immediately for Brent Rock to make the attempt, revolving in her mind how she was to do it. Zeta had difficulty in persuading Ava to see her at all, but once she had succeeded the possibility that all the mystery might be cleared up appealed strongly to Ava. For Zeta had framed her story cleverly and was playing desperately. Then I'll meet you at the hypnotists in about half an hour, agreed Ava after Zeta had told her how friendless she herself was and how both Balcom and Paul had refused her aid. Zeta left Brent Rock alone and was passing a dark corner when a hand reached out and grasped her by the arm, and she heard a voice that she recognized. Your failure has made me redouble my efforts, it hissed. I have just killed Locke in my apartment, and I—it was Balcom, but Zeta waited to hear no more. Secretly she had always loved Locke. Though she had worked against him, the very thought that he might be dead shocked her. She tore herself from the grasp of Balcom before she could hear more and ran like a deer toward the apartment. Fortunately it was not far. She tore upstairs and threw the door that Balcom had left open. Everything was as Balcom had left it, except that now the three men lay quite still. Zeta staggered over to a window and threw it open. Yet she got water and extinguished the still smoldering powder. Then falling on her knees she tried to help the stricken men. Not much time did she spend with the others, but to Locke with great tenderness she gave most of her attention.  Fortunately she was rewarded by seeing him open his eyes and gaze around. He looked up at her. "'I'll atone for all the wrong I've done,' she sobbed. Only—' She would have asked him to love her, but she knew that it was useless and the thought of Ava caused the words to stick in her throat. Locke did not understand, and the look on his face showed it. "'I didn't want to give you up,' wailed Zeta, now forgetting herself. "'I loved you. To prove it I will help you now. The girl you love is in terrible danger. You must hurry.' It was only too true. Ava had driven immediately to the hypnotists, and he had been instructed about her coming. At his door she had knocked, and an old, evil-visaged man, in flowing robes which were marked and cabalistic signs, had opened the door. In true Fakir fashion he salomed almost to the floor while in flowery language he bade her enter. Fearfully Ava stepped within. Signs of the zodiac, of crossbones and skulls, on walls and ceiling, met her gaze everywhere. In an alcove Ava could see a noosed rope hanging, for what purpose she knew not, but its presence she felt was sinister. "'I was told that a Dr. Q would be here,' Ava faltered. "'I do not see him.' "'Gracious lady,' bowed the hypnotist. "'I will bring him at once. Pray be seated.' Ava seated herself before a table upon which there stood a curious stand, supporting many mirrors. She examined it closely, and as she did so they all began to move. Each mirror moved on its own axis, and she watched with fatal curiosity. For now a bright light was cast from behind her on the revolving mirrors, and they formed a scintillating kaleidoscope that was bewildering in its intricacy. Ava quickly became fascinated. Then she was conscious of a drowsy feeling stealing over her.  The hypnotist now shut off the machine and, stepping before Ava, made several passes with his hands. Ava's eyes closed. The hypnotist turned and made a signal. Several panels opened simultaneously, and into the room there came a number of emissaries, who crept upon the now completely hypnotized girl. Nor was that all. A sound as if the clanking of chains was heard, and through an aperture in the wall larger than the others there stalked the automaton. At this very instant Locke and Zeta burst into the room and rushed toward Ava. The hypnotist slipped around them both, and in a moment had caught Zeta in his arms.  But he held her, and an emissary bringing ropes with his help bound her securely. As for Locke, he made a frantic attempt to reach Ava, but his way was blocked by a score of emissaries and the automaton himself. Desperately Locke dashed at the iron monster, only to be hurled to the floor as though he were a tiny child. In another moment the emissaries had bound him and carried him to the alcove in which hung the noosed rope. The hypnotist now pulled a lever and the method of the death intended for Locke was revealed. Directly under the suspended rope was a trapped door which opened. Locke gazed down into blackness, nothingness. An emissary threw some small heavy object into the yawning hole. For a long time nothing was heard. Then finally, far, far below, there came to their ears the sound of a distant splash. The fiendish plan was simple. To hang him and then to cut the rope. His body would go hurtling down to the subterranean river below and be carried out to sea. The hypnotist reversed the lever. The trap door closed. Locke was dragged beneath the rope and it was adjusted around his neck. Even in this awful moment his soul thought was of Ava. Would they throw her unconscious down the same yawning trap? Fearless he stood bound, fascinated, as he saw three emissaries seize her. But instead of dragging her to the trap, they dragged her toward one of the panels in the wall. What nameless torture was in store for her? He struggled furiously to get free to rush to her, but the noose only tightened on his neck. The hypnotist stepped to the lever that operated the trap under Locke's feet and began to pull the lever down. End of Chapter 22 Recording by Roger Maline Chapter 23 of The Master Mystery The master mystery by John W. Gray and Arthur B. Reeve Chapter 23 With a crash the hypnotist dropped unconscious to the floor as the hypnotic machine started to revolve rapidly. The emissaries turned from Locke and were dazzled by the blinding flashes from the whirling mirrors. It was Zeta who caused all the commotion. Unnoticed by the thugs, who were intent on sending Locke to his death and dragging Ava through the panel, Zeta had managed to free herself from her bonds, and true to her promise to Locke that she would help him, she had risked all for his sake. Once free from the ropes she had seized a heavy bronze vase and at just the critical moment of danger had hurled it at the hypnotist's head, striking him a terrific blow that had felled him and left him unconscious on the floor before he could spring the trap. She had then set the mechanical hypnotic machine in motion and standing behind it was herself practically invisible. It all happened so quickly that it seemed like a miracle. Locke, his hope revived, swiftly grasped the one chance for life that was left to him. By contracting his muscles he was able to slip out of the ropes which bound his arms. But since the noosed rope around his neck held him so that his toes barely touched the floor of the trap he could not, try as he might, manage to get the noose free. Suddenly a plan flashed across his mind. Hanging from the ceiling a few feet in front of him he could see an enormous chandelier. Throwing his hands above his head he grasped the rope, thus relieving the strain on his neck. Then, snapping his body backward, his feet came in contact with the wall. With tremendous force he kicked out, causing his body to swing in an arc toward the chandelier. It was not until he had wrapped his legs about the branches of the chandelier that the emissaries noticed what he was doing. So fascinated were they by the revolving mirrors. Even then they could scarcely resist the auto-hypnotic powers of the contrivance. Finally, however, with a shout they came to the attack. Locke was now hanging head downward. With one hand he succeeded in loosening the noose from about his neck, while with the other he struck out, hitting an emissary of fearful swinging blow that sent the fellow staggering backward to fall against the lever controlling the trap door. With a crash the trap was sprung, with the pit yawning beneath it. Struggling, striking, grappling with his assailants, Locke managed to hurl three of them to their deaths in the underground river below. Horror-stricken at the fate of their companions the other emissaries stepped back when, to add to their confusion, Zeta, with remarkable strength for so frail a girl, lifted the stand of mirrors and hurled it among them. Locke somersaulted to the floor and, seizing the broken stand, used it as a weapon with deadly effect. The emissaries turned and fled. An instant later Locke started to the panel through which Ava had been dragged when he heard steps from the other side. It was the emissaries who had seized Ava, coming back to see what all the rumpus was about. Locke, forewarned, slipped close to the wall, and as they passed through the panel one at a time he was able to fell them to the floor. Then he rushed through the panel just in time to see Ava, pursued by the automaton, running toward him. The very strangeness of her terrible adventure had brought Ava out of the hypnotic state into which she had been thrown, and she clung to Locke as though she were a child. Locke took her in his arms, and swiftly evading the slow-moving monster dashed back to the hypnotic room, calling to Zeta to run to the street. Thus all three were able to make good their escape. Ava had purposely left her motor turning over, and therefore it was barely an instant after they were in the street before they were streaking out of that quarter of the town. Zeta was now overwhelmed by her feelings, but it was Ava herself who spoke first. "'Forgive me, Zeta,' begged Ava, in the rush of her emotions, forgetting all that Zeta had done. But for you both of us would now be dead!' For some moments Zeta could not reply in her silent sadness at seeing the joy of Locke with his girl. "'I—I forgive you,' she murmured at length. "'It is for you to forgive me!' She paused a moment and choked back a sob. Then added bravely, "'I—I can even wish for your happiness, my dear. My hope is dead!' Only Locke understood, and as he watched Zeta he resolved to do all he could for her, realizing that someone else had made her a victim of her love and jealousy. All breathed a sigh of relief when at last they came again inside of the lights of Brent Rock. There was just the trace of a shadow to cloud the momentary happiness at their safe arrival, as on the steps Zeta refused to enter. "'I—I must say good-bye,' she murmured, wistfully, turning to go into the night alone. Nothing that either Locke or Ava could say seemed to swerve her purpose. "'Can't you see?' she exclaimed, finally, turning to Locke. "'Belcom, Paul, and Dr. Q all trust me now. I can help you solve the mystery better if I leave the house.' This was so evident that Locke and Ava were forced to consent. They took her back to the city, leaving her where she could be unobserved, then returned to a very hopeful mood again to Brent Rock. "'I think she can and will help us,' declared Ava, intuitively. "'Yes,' agreed Locke, slowly. "'And if Zeta finds the record of her birth, I believe we shall solve the mystery.' Worn out with the terrors through which she had passed, Ava bade Locke an affectionate good-night and went to her room, while he went to the laboratory, and tried again to find an antidote for the Madagascar madness, a work that kept him up late and to which he returned again early the following morning. It was on that following day, in the River-Roe Department of Deluxe Dora, that Paul and she were having a demi-monde lover's quarrel. Paul was intoxicated, and Dora may have been angry about that, or it may have been that she was jealous of some other woman. However, they were quarreling fiercely when there came a knock at the door. "'You open it,' flashed Dora to Paul. He demirred a moment, then, changing his mind, consented and crossed to the door, while Dora ran to her own room and hid. Paul was very much surprised to find that the visitor was Zeta, much excited. "'I want you to help me on something of great importance,' she exclaimed, almost before she had entered. "'Why, certainly, anything you desire,' hiccuped Paul. "'Come on in!' Zeta entered the apartment, and they crossed over to the Shez Lounge, where Zeta made her direct plea. "'Help me find the record of my birth,' she begged. Paul pulled his wandering wits together and thought a moment. Then a particularly crafty look came into his eyes, as he detached a key from his key-ring. "'Here, take this,' he directed. "'It's the key to my father's apartment. The records you want are there. He and I have quarreled, and you can go as far as you like.' Zeta took the key eagerly, thanked Paul profusely, and started for the door. She had barely passed the threshold before Dora, who had heard all, was at the telephone in her own room, and was angrily calling up Balcom at his apartment. Balcom, assisted by his Madagascar servant, was at the moment packing a trunk, perhaps preparatory to a hasty flight, should that become necessary. The moment the telephone rang, he picked up the receiver and nearly choked with anger, as he heard Dora's whispered voice over the wire. "'Paul has given Zeta the key to your apartment,' Dora hastened, and she is coming over to steal the record of her birth.' "'She is, eh? Well, I'll take care of that,' growled Balcom, as he rang off. Balcom went to a drawer in the table, and from it took a large book. Rapidly he turned over the pages until he found what he wanted. Then he made an erasure and an entry, and replaced the book in the drawer. Next he called the servant. "'When she comes, you make her a prisoner,' he directed. "'Understand!' Madagascar nodded and raised one of Balcom's hands to his own forehead as a sign of his fidelity. Balcom went out, and the servant stepped into the empty trunk to await the arrival of Zeta. But it was a very different person with whom the Madagascan had to contend in the end. On leaving Dora's apartment Zeta telephoned Brent Rock, and Locke answered immediately. Locke readily agreed to make the search of Balcom's apartment in Zeta's stead. When the Madagascan heard a key in the door, he stealthily peeped from his hiding-place and saw, instead of Zeta, Locke. Locke's back was turned, and the Madagascan, undaunted, sprang from the trunk and leaped, cat-like, on Locke's back. Not he had not reckoned on his antagonist. Locke, always on guard, was not taken quite by surprise. He caught the savage in a jujitsu hold, throwing him over his head to land in a far corner of the room. In spite of the fall, the Madagascan bounded to his feet like a rubber ball, but a few stiff jabs from Locke soon took all the fight out of him, and he lay still, completely knocked out. Locke made a hurried but systematic search of the room, and finally found the book that he sought, taking it and returning to Ava at Brent Rock. After telephoning, Zeta went directly to Dr. Q's laboratory, to which he was admitted after he had seen her through his periscope annunciator. The doctor was fumbling with a test tube from which some heavy fumes were issuing. He motioned her to a chair, near a table upon which were many papers which looked to Zeta as though they might be of importance. Always quick to act, Zeta raised her hand as if to arrange her hair, and as she did so, she purposely knocked the test tube out of the doctor's hand. The acid spattered on some of the papers, quickly setting them afire. Dr. Q, wildly excited, started to beat out the flames, and in so doing allowed several unseared letters to flutter to the floor. One in particular arrested Zeta's attention. It was a drawing, a plan of some sort, and was marked Plan of Den. Zeta placed her foot on it, and while Dr. Q was engaged with the small blaze, she reached down and hastily folding it, thrust it into one of the low shoes she was wearing. Then she went to Dr. Q's assistance, and in a jiffy the fire was out. The doctor was furiously angry at her, and feeling that she had accomplished all that she might expect, she expressed her regrets for the accident, and went out before his anger became any worse. Thus it was that Zeta arrived at Brent Rock only a few moments after Locke, whom she found in the library with Eva, turning over the pages of the record he had secured at Balcoms. The record purported to be a record of marriages of Wallace County, New York, and Locke finally found an entry that read, Peter Brent and Rita Dane. For a moment Zeta was stunned. It was her mother's name. Locke smiled. Yes, Zeta, he said quietly, for a moment Eva and I were surprised too, but it's a palpable forgery. Locke has tried to prove that you and Eva are half-sisters, but look! He handed her a powerful magnifying glass, and through it the clumsy forgery stood out in all its crudeness, showing plainly where other names had been erased and these inserted. Zeta was greatly disappointed, for she had thought that at last she would establish her identity. Then she remembered the paper she had hidden in her shoe. She slipped the paper out and handed it to Locke, who was greatly excited over its importance. They were still studying it when Locke heard a strange noise as of shuffling feet in the hallway. He jumped to the door, and there, in the dim light of the stairway leading down to the graveyard of genius, he saw a knot of men carrying another man who was evidently helpless. Locke started forward, but they were gone. Eva hurried upstairs to her father's room, fearing something was wrong. Father's gone! she cried despairingly. Locke threw himself full against the door at the head of the cellar stairs which the men had slammed shut. He tried to batter it down, but it was too strongly built. Then he drew his revolver and with the barrel started to push out the pins from the hinges. He worked feverishly and succeeded in driving the top pin out. Then, using it as a lever, he was able to pull the door from its frame. He dashed down the stairs, but was late by only the fraction of a second, as a metal hand was just closing the huge door to the graveyard of genius. He fumbled at the secret combination, and as he was doing so, Eva and Zeta joined him. The door swung open and they rushed through, but the place was deserted. They've carried your father through some secret passage, explained Locke. That would explain much that is strange that has happened about the house, too. Just then Zeta stepped forward with the plan in her hand. See, she cried, there is a secret passage marked on this! Locke studied the plan for some time, but whoever had drawn it had carefully concealed both the exact location of the passage and the method by which it was reached. As he searched, however, an idea occurred to Locke. I'll rig a trap with a camera, he decided, finally. A few minutes later he returned to the room with his special quickshutter camera, a flash-bag, and a ball of light twine. Carefully he focused the camera on the wall where the plan showed the secret passage to be. Then he rigged up the flash-bag and connected the hole with the twine, which he strung all about the graveyard of genius, so that should any part of the wall move it would cause the twine to break which in turn would at the same time release the shutter of the camera and explode the powder of the flashlight. Thus, without any direct human agency, a photograph would be taken. Next he attached wires and ran them to the library above where he installed an enunciator, the needle of which would indicate when the trap was sprung and the picture taken. Fascinated the two girls watched. Ava was almost fainting with grief at the terrible fate that had overtaken her father. Even in his sickness at least she had had him. But now he was gone, to what she could only guess. Locke tried to console her as they paced the library above, even though he realized that such consolation was hollow. It was perhaps half an hour later when suddenly the needle of the enunciator began to vibrate rapidly. All leaped to their feet and ran down the stairs to the graveyard. At once Locke rushed to the camera, put in a slide, and took out the plate holder. Then they hurried up to his laboratory. There Locke procured a developing bag and started to work. Nervously and impatiently Ava and Zeta watched him at his task. At last the negative was ready and Locke drew it from the bag and held it to the light. There glaring out of the plate was the devilish face of Balcom. Ava and Zeta both uttered a cry of astonishment and consternation. Even Locke was amazed. But the strongest feeling he had was anger as he turned to them. "'You two take this plan,' he exclaimed. "'It shows a den with an exit indicated. Get someone to go with you. Find the place and wait for me there. I can find the secret entrance from the graveyard from this negative, and I'm going through it.' Balcom, in the passageway between the graveyard of genius and the automaton's den, was livid with fury. He realized that his picture had been taken, surmised that the secret passage would be found and that some assault on the den would be attempted. But he had had no time to locate the camera, which Locke had hidden well, nor had he dared to search longer for it when he heard Locke bounding down the stairs from the library. Accordingly he had retreated and hastened back through the passageway into the automaton's den. "'Quick!' he shouted to the horde of emissaries in the place. Between dynamite, electric wires, and a rack bar. They think they have us trapped.  The emissaries hastened to obey him. They brought the explosive and the means to detonate it and carried the stuff into the passageway where they made the connections. An emissary stepped forward and volunteered to use the rack bar when the time came, but Balcum waved him away. "'No!' he growled. No one can take my revenge from me. I'll do the killing!' The emissaries fell back and went into the den. Balcum was making some final adjustments when the great rock separating the passageway from the graveyard of genius swung slowly on its balanced hinges. And from his work, even though he had expected the thing, Balcum looked up and in the passageway caught a glimpse of the dim outline of his arch-enemy, Locke. Balcum had been right. Locke had found the clue to the secret entrance to the tunnel. He worked feverishly to complete the final connection, but almost before he finished, Locke charged and the battle was on. Up and down the passageway they fought. Although Locke was the younger man, yet in Balcum he found a giant of strength. It was a fight between these two alone, for no emissary, no automaton now entered that passage of death. Neither uttered a sound. Neither had a weapon. It was the primitive struggle of man to man for life. But now Locke's youth and clean living began to tell in his favour, and he sensed that his adversary was weakening. He redoubled his efforts. After a particularly vicious blow from Locke, Balcum threw up his hands and toppled over backward in the direction of the rack-bar itself. Locke tried to throw Balcum's body out of the way. It was too late. With a thud, Balcum crashed full upon the plunger, driving it home. There was a blinding flash, a dull roar, and the earth rocked. Huge boulders were tossed about like feathers and the roof of the passage caved in. Balcum was killed instantly. Locke, with better fortune, had been hurled to the ground, where the earth and rocks and falling had formed a sort of arch over his body. He was alive, though barely conscious. He knew that soon a search would be made for him. But buried under tons of earth and rock, could any rescuers reach him in time? Was this the end? End of CHAPTER XXXIV For a long time Locke lay quite still. The shock to his nervous system had been terrific, and although physically almost uninjured, he had lost his usual grip on himself and felt very helpless. He felt terribly tired. The thought came to him that he had done enough, reached his limit of endurance. He craved sleep, a long sleep, and forgetfulness. But youth and the undying desire for life and accomplishment won over this deadly mood, and he began to take note of his position. His mind became clearer, and the ringing in his ears, caused by the explosion, gradually passed away. Then, like a flash, the question entered his mind of how he was able, buried under tons of debris, to breathe so freely. Why was the air not vitiated? He tried to move slowly and quietly so as not to dislodge any of the rocks that formed an arch over his body. He succeeded beyond his expectations, for his body was in a sort of natural pocket, and not one of his limbs was inextricably bound. Thus, twisting his body, he managed to draw himself into what seemed to be an even more open space. He hardly dared to breathe, so fearful was he that any moment he might reach a point where further progress would be impossible. He moved slowly, gropingly. Then suddenly he recoiled in horror, for his hand had come in contact with something which he recognized to be a man's face. In his shaken condition it was some seconds before he could control the wild jangling of his nerves. Then he searched his pockets and, finding a match, lighted it. There covered to the armpits by dirt and rocks was the body of Balcum, whose last act before his own death had been an attempt to murder Locke. Locke shuddered and redoubled his efforts to escape from the gruesome place. There still remained a small hole through which he must climb, but he negotiated it successfully, and in another moment he was above ground and free. Ava and Zeta had followed Locke's instructions, but had not waited to find any one to go with them to the exit from the den, nor did they wait at the exit more than a few minutes. Ava had taken a small electric torch with her, and becoming impatient at the non-appearance of Locke, she flashed it about as she followed the lines and marks indicated on the plan of the den. She and Zeta were surprised at the magnitude of the entrance passageway they uncovered. They had had to make a detour in order to reach the beach at a point where it was indicated that the exit of the den would be found, and even with the plan, which they consulted at every step, they almost missed their objective, for the cleft in the rocks slanted inward and was difficult to see even when one was standing directly in front of it. They had peered into the cavern and were waiting when they heard the explosion. They gazed at each other questioningly and with apprehension. What do you think it is? Asked Ava questioningly. Zeta could, of course, offer no explanation and did not try. Impulsively both girls took a very foolish chance. Both had thought of Locke and they started to run into the cave entrance and toward the sound of the explosion. Zeta was in the lead, and it was at this moment that the panic stricken emissaries came tumbling and fighting their way from the den. Zeta shrieked Ava to save herself, and Ava, although unwilling to leave her, knew that now she could do nothing to save Zeta and took her only chance of escape. As for Zeta, the emissaries were too frightened to pay attention to her. But behind them came the iron monster without nerves, it seemed. The automaton saw her and pinned her to the rock wall until she was unconscious. Then, picking her up as though she were a feather, it carried her out to the beach. Locke, the moment he freed himself from the hole which had so nearly been his grave, ran staggering toward the beach, for he felt instinctively that Ava and Zeta were in danger. Ava and Locke must have started at about the same time, she and her flight away from the automaton, and Locke to find the den exit for they met on the cliffside. Thank God you are safe, exclaimed Ava. Locke impulsively threw his arms about her and kissed her as they related their narrow escapes. Locke resolved to follow the trail of the automaton and to rescue Zeta. Also he had hopes of rescuing Ava's father at the same time. Ava wished to accompany him, but he would not think of it and insisted that she return to Brent Rock and keep all the doors barricaded. In fact he followed her almost to the house and saw that she entered safely, then hurried back to the beach. With the aid of Ava's electric torch, which he had given him, it was no difficult task to trace the huge footsteps of the automaton, though one by one the footprints of the emissaries took divergent directions, probably for the very purpose of confusing just such a pursuit. He followed the main track, however, until he came to the banks of a small stream. And there the trail was completely lost, for the monster had stepped into the water. Locke waited to the other bank and hunted for further tracks, but there were none to be found. The automaton had undoubtedly waited upstream to the point where he had decided to dispose of Zeta. Nothing daunted Locke started waiting upstream. This stream ran in a gully between the rocks and the cliffs on either side, which were very high. Time and time again Locke thought of turning back for more searchers. But he hated to return to Ava without at least some news, and therefore he persisted. He was at last rewarded, for just as he was about to turn to the right where the stream made a bend, he thought he heard a low laugh. He stopped dead in his tracks. Again, the sound of the broken laughter came to him. Cautiously Locke moved slowly forward until he could see around the bend. It was a strange sight that met his gaze. Under an enormous overhanging rock he saw about fifteen men standing, while against the cliff he could distinguish the form of a girl. It was undoubtedly Zeta. Sitting on a rock and quite close to her was Peter Brent. The emissaries were clustered around the central figure which was waving its arms of steel and indicating what they should do. As the automaton gesticulated, tiny points of fire gleamed from its eyes. Seen in the light of the lanterns held by the emissaries, the automaton never looked more terrifying. Even Locke himself, who had encountered the monster so often, felt a cold chill as he watched him and his men. Locke turned noiselessly, for well he knew that alone he could do nothing. He started to retrace his steps to Brent Rock, and no sooner had he arrived there than he told Ava that her father still lived and was uninjured, and that Zeta was safe in the new den of the automaton which he had discovered. Then he telephoned to his chief to send officers immediately to Brent Rock. After the explosion that had killed Balcom and had come so near to killing Locke, when he had finally rescued himself and had drawn himself out of the hole, there was one who watched him. It was none other than that mysterious being, Dr. Q. What twist of that disordered brain had brought him to the spot was not at once evident. However, as soon as Locke had left to go toward Ava, Dr. Q. came from his hiding place, madly smiling and wagging his head. He peered into the hole, and seeing nothing, lighted a match and thrust it far down into the darkness. There was a sharp intake of his breath, for the match revealed to him the dead face of Herbert Balcom. Dr. Q. drew back and stood erect. Dead, he muttered as he ran his fingers through his hair dayzedly. Dead! A strange thing happened. The mad light fled from the eyes of Dr. Q. and the twisted brain seemed to become clear. Suddenly, in the very field, the old man knelt down and prayed a prayer for his recovery. What was the strange power which Balcom had wielded over him, which death had snapped? The officers arrived at Brent Rock and Locke was ready. The party left immediately to go to the rescue of Brent and Zeta, and it took them only a short time to reach the spot which Locke had located. Disposing some of his force below the hanging Rock, Locke and some others went farther upstream. The two parties looked at their watches, waiting a certain time agreed on. Then the two parties moved toward each other. As they came inside of the spot, Locke experienced a keen disappointment. He could see no one. Advancing farther, he discovered Brent still on the same rock. Guarding him were three emissaries. That was all. Zeta, the automaton, and the other emissaries were gone. The three emissaries, seeing the numbers opposed to them, did not even offer to resist. They were placed under arrest, but nothing could induce them to tell where the others had gone. To fail Zeta after she had so nobly saved his life in the lair of the hypnotist was an unwelcome thought to Locke, and he resolved to rescue her at any risk. But first he felt he must restore Brent to his daughter, and therefore the party returned to Brent Rock. Ava was beside herself with joy at the safe return of her father, and led him tenderly to his room and sent immediately for the doctor in order that he might not suffer from his exposure. While this was going on at Brent Rock, Paul Balcom was rifling his father's papers in the apartment where Balcom had lived. He had unceremoniously thrown letters and documents all over the floor in his mad search for something. Finally he found what he was looking for, and smiling triumphantly as he read the paper, he thrust it into his pocket and hurriedly left the place, not stopping even to pick up the papers scattered all about. Zeta had evidently been watching the house, for no sooner had he left than she ran up the front steps of the Balcom apartment. In some way she had procured a key and let herself in. Then began a feverish search, very similar to that which Paul said instituted.  She had almost finished when a small book lying in a distant corner of the room caught her eye. At a glance she saw that it was a diary. Turning the pages rapidly she finally came to one over which she fairly gloated, for its information sold to the proper parties might make her independent for life. Even as she was gloating over her find there came the sound of many feet in the front hallway. Zeta had no time to run out of the room before the door opened, giving entrance to six emissaries surrounding her. The emissaries locked all the doors and tramped out. Only their leader remained for a moment to throw a parting shot. Remember, he threatened, this house is watched. See that you act accordingly. You will if you know what's good for you. Then he slammed the door and locked it behind him. For a long time Zeta sat there, too despairing to move. Then her ear caught the sound of stealthy footsteps in the hall and she ran and hid behind the portiers. The door opened slowly and Paul stole again into the room. Having nothing to fear from him Zeta came from her hiding place and confronted him. Paul was startled for a moment at her sudden appearance but recovered himself on seeing that it was Zeta.  As he questioned her Zeta told him briefly her story, or rather such portions of it as she thought it desirable for him to know. Paul, in turn, assured her of his undying friendship and something more. His earnestness almost made it seem true and he talked in his most fascinating and attractive manner. He finally ended his conversation with a direct proposal of marriage. But he had overstepped the mark and Zeta was not to be fooled. She laughed scornfully now. You should be on the stage. It needed only this proposal to prove to me that I am really Peter Brent's daughter. Peter Brent's daughter, he exclaimed. No, not his daughter. The daughter of Dr. Q. Impossible! recoiled Zeta astounded at the assertion. True, Zeta, he asserted. Absolutely true. Here, look at this paper. With hands that trembled, Zeta took the paper and read an amazing table. Unless the paper lied, she was indeed the daughter of Dr. Q. There was only one thing to do and that was to confront Dr. Q. at once and force him to a full explanation. In order not to antagonize Paul, Zeta was now particularly nice to him. Her object was to get him to consent to her escape so that she could inform Locke and Ava of her discovery and all three confront Dr. Q. and rest from him the story. At first Paul would not let her go unless she consented to him, but Zeta played him skillfully so that finally he unlocked the door. Then Zeta flew down the stairs and to a telephone around the corner where she called up Locke to whom she told as much as she dared over the wire. Locke told her that he and Ava would meet her within an hour in the lobby of one of the city's largest hotels and Zeta hastened there where she waited impatiently until they arrived. Dr. Q. admitted them immediately and they noticed with astonishment the wonderful change for the better that had taken place in the man. For with the restoration of his mind all the evil lines of his face had been obliterated, as it were, and in the place of the doddering half-imbussell they found a genial, kindly and distinguished gentleman who, with the utmost hospitality, brought chairs and begged them to be seated. Zeta, in her anxiety to know the truth, could hardly contain her impatience. Tossed from pillar to post, dominated once by the strong, evil mind of Valcom, Zeta had run the gamut of human emotions before she had barely passed her girlhood. Seeing her agitation, Locke undertook to interrogate the doctor. "'Dr. Q.' he began. "'I believe you know the perpetrator of the crimes to which we have all been subjected. And we have come to you in all friendliness to ask you to clear this mystery up for us.' "'Valcom is dead,' added Locke pointedly. "'Yes, I know that,' interrupted Dr. Q. "'You know?' all asked. "'How do you know?' The doctor told of having seen Valcom's body, but at first he could not explain why he was in the spot at the time. Then Locke went on to tell him of the document that Paul had shown to Zeta. Dr. Q sank heavily into a chair. "'That document that Paul Valcom showed Zeta,' he exclaimed after a moment, told the truth. All were startled. Zeta would have risen with a cry had not Locke gently touched her arm. "'Tell us the story,' demanded Locke of Q. For some moments Dr. Q seemed to be collecting his scattered thoughts as though still a haze hung over his mind. Then he began to speak, becoming more certain of his strange story. "'It was many years ago,' he began as all drew closer about him, listening breathlessly to his narrative. "'And all these years I have been quite mad. The man now lying dead, Valcom, was the cause of all these years of misery. The old man passed his hand over his head as though to wipe away a recollection of hate and fear. Then resumed, "'I was an inventor in those days, and very successful. I had built up a great fortune, had built a great house, and in that house I had a beautiful wife and two of the loveliest children, a boy and a girl, that man ever had.' He paused again, then went on. One day a man entered my life and proposed to put my inventions on the market very advantageously. He was suave, polished, and apparently a gentleman. At any rate I trusted him. You all knew him. It was Herbert Balcom. At the time I did not know that in order to give my inventions a clear field the inventions of hundreds of poor inventors would be suppressed. I know now, Miss Brent, that your own father was led along in the scheme, even as I was. Balcom possessed the mastermind, and we were all as children in his hands. Dr. Q stopped a moment. It was evident that he was speaking with restraint when it came to Peter Brent, perhaps glossing over what the man had done. Though he did not say so, the mere fact that at last Brent had seen the light and had planned a wholesale restitution weighed supremely in Dr. Q's mind. One day, he resumed, Balcom came to me and what I know now was merely feigned excitement and fear. Thereafter us, he cried, Brent and I have done our best, but the government is after you, and we can't protect you any longer. Then, for the first time, Balcom told me of the real purposes of the company, told me that he had been drawn into it by Brent.  I hated your father with an undying hate, Miss Brent. Well, to make the sad story short, I took my wife and children and sailed secretly for the far-thermost parts of the world. Off the coast of Madagascar, in the Straits, a typhoon came up. The vessel was driven on the rocks and wrecked. I was cast ashore, and I vaguely remember how, for days and weeks, I patrolled that beach, subsisting on shellfish, imploring God day and night to restore my wife and children to me. Then my mind gave way. The natives took me in, thinking me a God. They took me many miles inland. Savages the world over are superstitious about the demented, and so they treated me kindly. They installed me in a thatched hut of my own and made me a leader. How many months, years, I stayed with them, I do not know. But true to my mechanical instinct, I rigged up a forge and improved many of the crude instruments of the natives, principally those of agriculture. But transcending every other feeling, I hated Brent. In my madness I conceived the idea that I would construct an iron giant, that upon its completion, if I could only procure the brain of a man who had died of a lightning-stroke or other electric agency, I could, by installing this brain in the brain cavity of the giant, give it volition, make it a superman without feeling or conscience. It was a mad idea, but I was mad. At about this time Belcom came to Madagascar. He found me, and knowing my intense hatred of Peter Brent, he cruelly added fuel to the fire. Already he must have known that Brent was coming to his senses and planning his great restitution to genius. He promised me that if I would come to New York with him, he would secure an electrocuted brain so that I could perfect my steel automaton and obtain my revenge. I was easily persuaded, and I sailed with Belcom, bringing the iron monster with me. A strange light gleamed in the old man's eyes as he spoke, not the light of madness, but of kindness now. Children, he said at length, I have during these lucid moments watched you all closely. Call it instinct, if you will, but you, Zeta, and you, Quentin, seem to be particularly dear to me now. Today returning from the scene of the explosion, with every faculty not only clear, but rather sharpened by long disuse, I pieced the years, the months, even the days together. I searched in an old trunk, and I found this. It was a list of those rescued from the steamer Magnifique, and with amazement they read the names among the passengers. Quentin Locke, Zeta Locke. There was a short note at the bottom of the list to the effect that no trace of either the father or the mother of the two children had been found. Paper after paper which Dr. Q. had found, where they had been preserved by Belcom, proved the identification and the story. Locke's head was in a whirl at the sudden change in relationships, but not more so than Zeta's. Finally Zeta could stand the strain no longer. What had been a hopeless love was now explained. My, my brother, she sobbed as she buried her head on Quentin's shoulder. Both turned to Dr. Q., Dr. Q., no longer, but really Quentin Locke, Sr., whence had come the queue.  My children, he murmured. I see that it is not too late for me to find happiness after all. Our enemy is dead. It was Balcom, of course, who was in that frame of armor, who used that terrible poison that stole away Brent's mind. The iron monster will walk no more. Henceforth Peter Brent and Miss Ava and you, Quentin, will— Dr. Q. had not time to finish the sentence. The door burst inward. The automaton, its eyes aflame, stocked in among them. CHAPTER XXIV