Their camp groups were small, and, although no exact figure could be obtained, they never numbered more than the occupants of a few buffalo-hide tipis. Each such group had its leader who decided the hunting itinerary. The Dukarikas had no over-all political organization; each small camp group was politically and economically autonomous. "Dukarika," then, can be assumed to be a term defining a type of economic adaptation rather than a social unit. The discreet Dukarika social units did not assert hunting rights to particular territories. Any group could hunt where it pleased, and they in no way resisted or resented the entry of the mounted Shoshone during the summer. Although they undoubtedly had contact with the latter, they did not join the spring or fall buffalo hunts, nor did they at any time during the pre-treaty period acknowledge the political leadership of the valley people. After the reservation was established, however, they left the mountains and settled in the Trout Creek section of the Wind River Reservation. EASTERN SHOSHONE TERRITORY Thus far, we have presented the pertinent historical data on Shoshone ecology in Wyoming and adjacent parts of northern Utah and we have described the annual cycle of economic activities during the early reservation period. The following summary of information on Eastern Shoshone territory will consider both kinds of data but will not attempt to delineate the social and political affiliations of the peoples using the lands. This subject, as the previously cited statement by Shimkin suggests (p. 300), is extremely complex and will be reserved for further discussion. The most perplexing problem presented by the Eastern Shoshone is the extent of their penetration into the Missouri River waters. Although the Shoshone evidently undertook forays at least as far east as Fort Laramie, contemporary informants and historical sources agree that their main hunting grounds extended no farther east than the Sweetwater and other headwaters of the North Platte River. We have no certain information of Shoshone use of lands east of the upper Sweetwater River, and informants gave no data on this sector.