about one
o'clock in the morning
When Bradley went on guard at midnight , September 14th , his thoughts were largely occupied with rejoicing that the night was almost spent without serious mishap and that the morrow would doubtless see them all safely returned to Fort Dinosaur . The hopefulness of his mood was tinged with sorrow by recollection of the two members of his party who lay back there in the savage wilderness and for whom there would never again be a homecoming . No premonition of impending ill cast gloom over his anticipations for the coming day , for Bradley was a man who , while taking every precaution against possible danger , permitted no gloomy forebodings to weigh down his spirit . When danger threatened , he was prepared ; but he was not forever courting disaster , and so it was that when about one o'clock in the morning of the fifteenth , he heard the dismal flapping of giant wings overhead , he was neither surprised nor frightened but idly prepared for an attack he had known might reasonably be expected . The sound seemed to come from the south , and presently , low above the trees in that direction , the man made out a dim , shadowy form circling slowly about . Bradley was a brave man , yet so keen was the feeling of revulsion engendered by the sight and sound of that grim , uncanny shape that he distinctly felt the gooseflesh rise over the surface of his body , and it was with difficulty that he refrained from following an instinctive urge to fire upon the nocturnal intruder . Better , far better would it have been had he given in to the insistent demand of his subconscious mentor ; but his almost fanatical obsession to save ammunition proved now his undoing , for while his attention was riveted upon the thing circling before him and while his ears were filled with the beating of its wings , there swooped silently out of the black night behind him another weird and ghostly shape .