never to have fully recovered, and now numbers probably no more than 3,000, mostly in Canada, where they continue to roam the plains they have occupied for half a century. ¢EGIHA According to tribal traditions collected by Dorsey, the ancestors of the Omaha, Ponka, Elwapa, Osage, and Kansa were originally one people dwelling on Ohio and Wabash rivers, but gradually working westward. The first separation took place at the mouth of the Ohio, when those who went down the Mississippi became the Kwapa or Downstream People, while those who ascended the great river became the Omaha or Up-stream People. This separation must have occurred at least as early as 1500, since it preceded De Soto’s discovery of the Mississippi. The Omaha group (from whom the Osage, Kansa, and Ponka were not yet separated) ascended the Mississippi to the mouth of the Missouri, where they remained for some time, though war and hunting parties explored the country northwestward, and the body of the tribe gradually followed these pioneers, though the Osage and Kansa were successively left behind. Some of the pioneer parties discovered the pipestone quarry, and many traditions cling about this landmark. Subsequently they were driven across the Big Sioux by the Yankton Indians, who then lived toward the confluence of the Minnesota and Mississippi. The group gradually differentiated and finally divided through the separation of the Ponka, probably about the middle of the seventeenth century. The Omaha gathered south of the Missouri, between the mouths of the Platte and Niobrara, while the Ponka pushed into the Black Hills country. The Omaha tribe remained within the great bend of the Missouri, opposite the mouth of the Big Sioux, until white men came. Their hunting ground extended westward and southwestward, chiefly north of the Platte and along the Elkhorn, to the territory of the Ponka and the Pawnee (Caddoan); and in 1766 Carver met their hunting parties on Minnesota river. Toward the end of the eighteenth century they were nearly destroyed by smallpox, their number having been reduced from about 3,500 to but little over 300 when they were visited by Lewis and Clark, their famous chief Blackbird being one of those carried off by the epidemic. Subsequently they increased in numbers; in 1890 their population was about 1,200. They are now on reservations, mostly owning land in severalty, and are citizens of the United States and of the state of Nebraska.