Then, in one terrible instant, Jones completely lost the power to draw a breath. The leather belt he had seized for Rogers' further strapping fell from his limp hands, and a spasm of shivering convulsed him from head to foot. He might have known the place would drive him mad as it had driven Rogers—and now he was mad. He was mad, for he now harbored hallucinations more weird than any which had assailed him earlier that night. The madman was bidding him hear the splashing of a mythical monster in a tank beyond the door—and now, God help him, he did hear it!