midnight
There was still air in his lungs when he found himself safely through the deluge so he knew that its passage had taken him only a brief but thrilling instant . For a time he could see nothing . Then he made out a dark form drawing itself up out of the water . Beyond that there lay a chaos of midnight blackness , and he knew that his eyes were staring into the depths of a great cavern ! Gripping the edge of the rock ledge he dragged himself up as both Wabigoon and Mukoki had done , and found his feet upon a soft floor of sand . Suddenly he felt a hand clutch his arm . A half-shout , rising faintly above the wash of the cataract , sounded in his ear .