The stable center of Eastern Shoshone settlement pattern was the winter camp. All informants agreed that the chief winter camps were in the valleys of the Big and Little Wind rivers, in the region of the present Diversion Dam and Fort Washakie, respectively. There they were protected from winter storms, and the winds blew enough snow from the ground to allow the horses to graze. In the bottomlands by the streams they found water and firewood and enjoyed the protection of the cottonwood trees. In the period before the ending of intertribal hostilities in Wyoming camps were closely clustered to allow for mutual defense in the event of an attack, but after the pacification of the area, people pitched their tipis farther apart. Although never safe from attack, the Shoshone had greater security during the winter, since the cold and snows made their enemies relatively immobile also. Winter residence at Wind River was not obligatory. Smaller groups were said to camp on the western slope of the Wind River Mountains, in the vicinity of Pinedale, and others remained near Fort Bridger. Contemporary informants gave no confirmation of Shimkin's statement that a group of Shoshone, under Washakie, customarily wintered in the Absaroka Mountain foothills on the head of the Grey Bull River (Shimkin, 1947_a_, p. 247). Also, Shimkin's chart, which shows that Shoshone occasionally spent the winter in the Powder and Sweetwater River valleys (p. 279), probably indicates the true situation only for the period after the area became secure from attack, in the 1870's. All of these locales would be highly vulnerable to hostiles, as was the Wind River Valley in the pre-reservation era, and it is highly probable that Shimkin's informants spoke of post-reservation events and not of a traditional pattern. Subsistence during the winter was gained chiefly from the stored yield of the fall buffalo hunt. The meat was dried and pounded and placed in large rawhide bags. True pemmican was not manufactured, although the pulverized buffalo meat was mixed with dried roots and berries preparatory to being eaten. Stores frequently ran low towards the end of winter, and some hardship resulted. However, the stored food was supplemented by elk which had been driven out of the mountains by snow, and by antelope and deer meat. Rabbits were also snared. Some informants stated that the Shoshone went into winter camp as early as October. Others, however, reported that the winter camp was made as late as December. It would seem that November to December are the more probable times. Support for this date is found in Shimkin (1947_a_, p. 279).