During the spring, summer, and early fall the females and their young keep together in small bands in the mountains, well up, close under what is called the "rim rock," or the "reefs," where the grass is sweet and tender, the going good, and where a refuge is within easy reach. While hunting in such places in September and October, when the first snows are falling, one is likely to find the trail of a band of sheep close up beneath the rock. If the mountain is one long inhabited by sheep, they have made a well-worn trail on the hillside, and the little band, while traveling along this in a general way, scatters out on both sides feeding on the grass heads that project above the snow, and often with their noses pushing the light snow away to get at the grass beneath. I have never seen them do this, nor have I seen them paw to get at the grass, but the marks in the snow where they have fed showed clearly that the snow was pushed aside by the muzzle. Like most other animals, wild and tame, sheep are very local in their habits, and one little band will occupy the same basin in the mountains all summer long, going to water by the same trail, feeding in the same meadows and along the same hillsides, occupying the same beds stamped out in the rough slide rock, or on the great rock masses which have fallen down from the cliff above. Even if frightened from their chosen home by the passage of a party of travelers, they will go no further than to the tops of the rocks, and as soon as the cause of alarm is removed will return once more to the valley. I saw a striking instance of this some years ago, when, with a Geological Survey party, I visited a little basin on the head of one of the forks of Stinking Water in Wyoming, where a few families of sheep had their home. Our appearance alarmed the sheep, which ran a little way up the face of the cliff, and then, stopping occasionally to look, clambered along more deliberately. When we reached the head of the basin we found that there was no way down on the other side, and that we must go back as we had come. The afternoon was well advanced and the pack train started back and camped only a mile or two down the valley, while I stopped among some great rocks to watch the movements of the sheep. Though at first not easy to see, the animals' presence was evident by their calling, and at length several were detected almost at the top of the cliff, but already making their way back into the valley.