He had taken two hundred and sixty-nine steps--afterward he knew that he should never forget that number--when something bumped gently against him from behind. Instantly he wheeled about and with knife ready to defend himself stretched forth his right hand to push away the object that now had lodged against his body. His fingers feeling through the darkness came in contact with something cold and clammy--they passed to and fro over the thing until Bradley knew that it was the face of a dead man floating upon the surface of the stream. With an oath he pushed his gruesome companion out into mid-stream to float on down toward the great pool and the awaiting scavengers of the deep. At his four hundred and thirteenth step another corpse bumped against him--how many had passed him without touching he could not guess; but suddenly he experienced the sensation of being surrounded by dead faces floating along with him, all set in hideous grimaces, their dead eyes glaring at this profaning alien who dared intrude upon the waters of this river of the dead--a horrid escort, pregnant with dire forebodings and with menace. Though he advanced very slowly, he tried always to take steps of about the same length; so that he knew that though considerable time had elapsed, yet he had really advanced no more than four hundred yards when ahead he saw a lessening of the pitch-darkness, and at the next turn of the stream his surroundings became vaguely discernible. Above him was an arched roof and on either hand walls pierced at intervals by apertures covered with wooden doors. Just ahead of him in the roof of the aqueduct was a round, black hole about thirty inches in diameter. His eyes still rested upon the opening when there shot downward from it to the water below the naked body of a human being which almost immediately rose to the surface again and floated off down the stream. In the dim light Bradley saw that it was a dead Wieroo from which the wings and head had been removed. A moment later another headless body floated past, recalling what An-Tak had told him of the skull-collecting customs of the Wieroo. Bradley wondered how it happened that the first corpse he had encountered in the stream had not been similarly mutilated. The farther he advanced now, the lighter it became. The number of corpses was much smaller than he had imagined, only two more passing him before, at six hundred steps, or about five hundred yards, from the point he had taken to the stream, he came to the end of the tunnel and looked out upon sunlit water, running between grassy banks. One of the last corpses to pass him was still clothed in the white robe of a Wieroo, blood-stained over the headless neck that it concealed.