Crawling, choking with thirst, slowly forward, he reached the water, and, reclining on his side and one elbow, he was about to lean down to drink when he suddenly felt, with some kind of an instinctive shock, that he was no longer alone on the ledge. He had no interest in analyzing the conviction; he did not even question it. Not a sound had reached his ears. Only a moment before he had looked carefully all around. But the field of his vision was closely circumscribed by the walls about him. It was easy for an invader to come on his retreat unawares--at all events, somebody, he was almost sure, stood behind him. The silence meant an enemy. The first thing to expect was a bullet. It would probably be aimed at the back of his head. At least he knew this was the spot to aim for to kill a man instantly and painlessly--yet he shrank from that anticipated crash. And it was this thought that cost the defenseless man at the moment the most pain--that feeling, in advance, of the blow of the bullet that should snuff out his life. Defense was out of the question; he was as helpless as a baby. An impulse in his fingers to clutch his revolver he restrained at once--it could only hasten his death. He wondered, as the seconds passed, why his executioner hesitated to shoot, but he could not rid himself of the mental horror of being shot in the base of the brain. Anywhere else he would have almost welcomed a bullet; anywhere else it might have given him one chance for life through rolling over after he was struck in an attempt to kill his assailant. His thoughts, working in flashes of lightning, suggested every possible trick of escape, and as rapidly rejected each. There was nothing for it but to play the part, to take the blow with no more than a quiver when it came. He had once seen a man shot in just that way. Braced to such a determination, de Spain bent slowly downward, and, with eyes staring into the water for a reflection that might afford a glimpse of his enemy, he began to drink. A splash above his head frightened him almost to death. It was a water ousel dashing into the foaming cataract and out again, and the spray falling from the sudden bath wrecked the mirror of the pool. De Spain nearly choked. Each mouthful of water was a struggle. The sense of impending death had robbed even the life-giving drafts of their tonic; each instant carried its acute sensation of being the last. At length, his nerves weakened by hunger and exposure, revolted under the strain. Suppose it should be, after all, a fantasy of his fever that pictured so vividly an enemy behind. With an effort that cost more mental torture than he ever had known, he drew back on his elbow from the pool, steadied himself, turned his head to face his executioner, and confronted Nan Morgan. CHAPTER XIII PARLEY