This twined root-gathering basket may have been traded to Lewis and Clark as a food container. They received a "bag prepared of grass" from a Sahaptin-speaking community they met on the north bank of the Columbia River. This bag, however, is made in the style of the nearby Wasco-Wishram, who are well-known for these cylindrical forms, called "sally bags." It may have been traded several times. The primary design elements are believed to be the face of an ancestral leader, Tsagaglalal, "She Who Watches;" whose image appears in petroglyphs along the Columbia River.
