For still another two hours Thor led Muskwa on that tiresome jaunt into the north. They had travelled a good twenty miles since leaving the Bighorn Highway, and to the little tan-faced cub those twenty miles were like a journey around the world. Ordinarily he would not have gone that far away from his birthplace until his second year, and very possibly his third. Not once in this hike down the valley had Thor wasted time on the mountain slopes. He had picked out the easiest trails along the creek. Three or four miles below the pool where they had left the old bear he suddenly changed this procedure by swinging due westward, and a little later they were once more climbing a mountain. They went up a long green slide for a quarter of a mile, and luckily for Muskwa's legs this brought them to the smooth plainlike floor of a break which took them without much more effort out on the slopes of the other valley. This was the valley in which Thor had killed the black bear twenty miles to the southward. From the moment Thor looked out over the northern limits of his range a change took possession of him. All at once he lost his eagerness to hurry. For fifteen minutes he stood looking down into the valley, sniffing the air. He descended slowly, and when he reached the green meadows and the creek-bottom he _mooshed_ along straight in the face of the wind, which was coming from the south and west. It did not bring him the scent he wanted--the smell of his mate. Yet an instinct that was more infallible than reason told him that she was near, or should be near. He did not take accident or sickness or the possibility of hunters having killed her into consideration. This was where he had always started in to hunt for her, and sooner or later he had found her. He knew her smell. And he crossed and recrossed the bottoms so that it could not escape him. When Thor was love-sick he was more or less like a man: that is to say, he was an idiot. The importance of all other things dwindled into nothingness. His habits, which were as fixed as the stars at other times, took a complete vacation. He even forgot hunger, and the whistlers and gophers were quite safe. He was tireless. He rambled during the night as well as the day in quest of his lady-love. It was quite natural that in these exciting hours he should forget Muskwa almost entirely. At least ten times before sunset he crossed and recrossed the creek, and the disgusted and almost ready-to-quit cub waded and swam and floundered after him until he was nearly drowned. The tenth or dozenth time Thor forded the stream Muskwa revolted and followed along on his own side. It was not long before the grizzly returned.