He was more than sleepless. Every nerve in his body demanded action, and his brain was fired by strange thoughts until their vividness seemed to bring him face to face with a reality that set his blood stirring with an irresistible thrill. He believed he had made a discovery, that St. Pierre had betrayed himself. What he had visioned, the conclusion he had arrived at, seemed inconceivable, yet what his own eyes had seen and his ears had heard pointed to the truth of it all. The least he could say was that St. Pierre's love for Marie-Anne Boulain was a strange sort of love. His attitude toward her seemed more like that of a man in the presence of a child of whom he was fond in a fatherly sort of way. His affection, as he had expressed it, was parental and careless. Not for an instant had there been in it a betrayal of the lover, no suggestion of the husband who cared deeply or who might be made jealous by another man.

Sitting in darkness thickening with the nearer approach of storm, David recalled the stab of pain mingled with humiliation that had come into the eyes of St. Pierre's wife when she had stood facing her husband. He heard again, with a new understanding, the low note of pathos in her voice as in song she had called upon the Mother of Christ to hear her—and help her. He had not guessed at the tragedy of it then. Now he knew, and he thought of her lying awake in the gloom beyond the bulkhead, her eyes were with tears. And St. Pierre had gone back to his raft, singing in the night! Where before there had been sympathy for him, there rose a sincere revulsion. There had been a reason for St. Pierre's masterly possession of himself, and it had not been, as he had thought, because of his bigness of soul. It was because he had not cared. He was a splendid hypocrite, playing his game well at the beginning, but betraying the lie at the end. He did not love Marie-Anne as he, Dave Carrigan, loved her. He had spoken of her as a child, and he had treated her as a child, and was serenely dispassionate in the face of a situation which would have roused the spirit in most men. And suddenly, recalling that thrilling hour in the white strip of sand and all that had happened since, it flashed upon David that St. Pierre was using his wife as the vital moving force in a game of his own—that under the masquerade of his apparent faith and bigness of character he was sacrificing her to achieve a certain mysterious something it the scheme of his own affairs.

Yet he could not forget the infinite faith Marie-Anne Boulain had expressed in her husband. There had been no hypocrisy in her waiting and her watching for him, or in her belief that he would straighten out the tangles of the dilemma in which she had become involved. Nor had there been make-believe in the manner she had left him that day in her eagerness to go to St. Pierre. Adding these facts as he had added the others, he fancied he saw the truth staring at him out of the darkness of his cabin room. Marie-Anne loved her husband. And St. Pierre was merely the possessor, careless and indifferent, almost brutally dispassionate in his consideration of her.

A heavy crash of thunder brought Carrigan back to a realization of the impending storm. He rose to his feet in the chaotic gloom, facing the bulkhead beyond which he was certain St. Pierre's wife lay wide awake. He tried to laugh. It was inexcusable, he told himself, to let his thoughts become involved in the family affairs of St. Pierre and Marie-Anne. That was not his business. Marie-Anne, in the final analysis, did not appear to be especially abused, and her mind was not a child's mind. Probably she would not thank him for his interest in the matter. She would tell him, like any other woman with pride, that it was none of his business and that he was presuming upon forbidden ground.

He went to the window. There was scarcely a breath of air, and unfastening the screen, he thrust out his head and shoulders into the night. It was so black that he could not see the shadow of the water almost within reach of his hands, but through the chaos of gloom that lay between him and the opposite shore he made out a single point of yellow light. He was positive the light was in the cabin on the raft. And St. Pierre was probably in that cabin.

A huge drop of rain splashed on his hand, and behind him he heard sweeping over the forest tops the quickening march of the deluge. There was no crash of thunder or flash of lightning when it broke. Straight down, in an inundation, it came out of a sky thick enough to slit with a knife. Carrigan drew in his head and shoulders and sniffed the sweet freshness of it. He tried again to make out the light on the raft, but it was obliterated.

Mechanically he began taking off his clothes, and in a few moments he stood again at the window, naked. Thunder and lightning had caught up with the rain, and in the flashes of fire Carrigan's ghost-white face stared in the direction of the raft. In his veins was at work an insistent and impelling desire. Over there was St. Pierre, he was undoubtedly in the cabin, and something might happen if he, Dave Carrigan, took advantage of storm and gloom to go to the raft.

It was almost a presentiment that drew his bare head and shoulders out through the window, and every hunting instinct in him urged him to the adventure. The stygian darkness was torn again by a flash of fire. In it he saw the river and the vivid silhouette of the distant shore. It would not be a difficult swim, and it would be good training for tomorrow.

Like a badger worming his way out of a hole a bit too small for him, Carrigan drew himself through the window. A lightning flash caught him at the edge of the bateau, and he slunk back quickly against the cabin, with the thought that other eyes might be staring out into that same darkness. In the pitch gloom that followed he lowered himself quietly into the river, thrust himself under water, and struck out for the opposite shore.

When he came to the surface again it was in the glare of another lightning flash. He flung the water from his face, chose a point several hundred yards above the raft, and with quick, powerful strokes set out in its direction. For ten minutes he quartered the current without raising his head. Then he paused, floating unresistingly with the slow sweep of the river, and waited for another illumination. When it came, he made out the tented raft scarcely a hundred yards away and a little below him. In the next darkness he found the edge of it and dragged himself up on the mass of timbers.