In another moment Langdon had recognized it, and yet even then he told himself that his ears must be playing him false. It could not be the barking of dogs! By this time Bruce and Metoosin were far to the south with the pack; at least Metoosin should be, and Bruce was on his return to the camp! Quickly the sound grew more distinct, and at last he knew that he could not be mistaken. The dogs were coming up the valley. Something had turned Bruce and Metoosin northward instead of into the south. And the pack was giving tongue--that fierce, heated baying which told him they were again on the fresh spoor of game. A sudden thrill shot through him. There could be but one living thing in the length and breadth of the valley that Bruce would set the dogs after, and that was the big grizzly! For a few moments longer Langdon stood and listened. Then he hurried back to camp, tied Muskwa to his tree, armed himself with another rifle, and resaddled his horse. Five minutes later he was riding swiftly in the direction of the range where a short time before Thor had given him his life. CHAPTER EIGHTEEN Thor heard the dogs when they were a mile away. There were two reasons why he was even less in a mood to run from them now than a few days before. Of the dogs alone he had no more fear than if they had been so many badgers, or so many whistlers piping at him from the rocks. He had found them all mouth and little fang, and easy to kill. It was what followed close after them that disturbed him. But to-day he had stood face to face with the thing that had brought the strange scent into his valleys, and it had not offered to hurt him, and he had refused to kill it. Besides, he was again seeking Iskwao, the she-bear, and man is not the only animal that will risk his life for love. After killing his last dog at dusk of that fatal day when they had pursued him over the mountain Thor had done just what Bruce thought that he would do, and instead of continuing southward had made a wider detour toward the north, and the third night after the fight and the loss of Muskwa he found Iskwao again. In the twilight of that same evening Pipoonaskoos had died, and Thor had heard the sharp cracking of Bruce's automatic. All that night and the next day and the night that followed he spent with Iskwao, and then he left her once more. A third time he was seeking her when he found Langdon in the trap on the ledge, and he had not yet got wind of her when he first heard the baying of the dogs on his trail. He was travelling southward, which brought him nearer the hunters' camp. He was keeping to the high slopes where there were little dips and meadows, broken by patches of shale, deep coulees, and occasionally wild upheavals of rock. He was keeping the wind straight ahead so that he would not fail to catch the smell of Iskwao when he came near her, and with the baying of the dogs he caught no scent of the pursuing beasts, or of the two men who were riding behind them.