With a curve, the yard shaped itself to the buried stream. It lay between forested and moderately steep mountains that rose high. In this primeval winter scene the deer had faced the slow-going snow in the primitive way. At the upper end of the yard all the snow was trampled to compactness, and over this animals could walk without sinking in. Firm, too, were the surfaces of the much looped and oft trodden trails. The trail nearest to the stream passed beneath a number of beautiful snow-piled arches. These arches were formed of outreaching and interlacing arms of parallel growths of willow and birch clusters. The stream gurgled beneath its storm window of rough ice. I rounded the yard and at the lower end I found the carcasses of the entire herd of deer,--nine in all,--evidently recently killed by a mountain lion. He had eaten but little of their flesh. Wolves had not yet discovered this feast, but a number of Rocky Mountain jays were there. The dark spruces stood waiting! No air stirred. Bright sunlight and bluish pine shadows rested upon the glazed whiteness of the snow. The flock of cheerful chickadees feeding through the trees knew no tragedy. The winter food of big game consists of dead grass, shrubs, twigs, buds and bark of trees, moss, and dry plants. At times grass dries or cures before the frost comes. When thus cured it retains much nutrition,--is, in fact, unraked hay. If blighted by frost it loses its flavor and most of its food value. During summer both elk and deer range high on the mountains. With the coming of winter they descend to the foothill region, where the elk collect in large herds, living in yards in case of prolonged deep snow. Deer roam in small herds. Occasionally a herd of the older elk will for weeks live in the comparatively deep snow on northern slopes,--slopes where the snow crusts least. Here they browse off alder and even aspen bark. The present congestion of elk in Jackson Hole represents an abnormal condition brought about by man. The winter feed on which they formerly lived is devoured by sheep or cattle during the summer; a part of their former winter range is mowed for hay; they are hampered by fences. As a result of these conditions many suffer and not a few starve. Wolves are now afflicting both wild and tame herds in Jackson Hole. Apparently the wolves, which formerly were unknown here in winter, have been drawn thither by the food-supply which weak or dead elk afford. The regular winter home of wild sheep is among the peaks above the limits of tree growth. Unlike elk and deer, the mountain sheep is found in the heights the year round. He may, both in winter and summer, make excursions into the lowlands, but during snowy times he clings to the heights. Here he usually finds a tableland or a ridge that has been freed of snow by the winds. In these snow-free places he can feed and loiter and sometimes look down on unfortunate snow-bound deer and elk.