The Blackfeet or Siksika[839], an Algonquian confederacy of the northern plains, agree in culture with the Plains tribes generally, though there is evidence of an earlier culture, approximately that of the eastern woodland tribes. They are divided into the Siksika proper, or Blackfeet, the Kainah or Bloods, and the Piegan, the whole being popularly known as Blackfoot or Blackfeet. Formerly bison and deer were their chief food and there is no evidence that they ever practised agriculture, though tobacco was grown and used entirely for ceremonial purposes. The doors of their tipis always faced east. They have a great number of dances--religious, war and social--besides secret societies for various purposes, together with many "sacred bundles" around every one of which centres a ritual. Practically every adult has his personal "medicine." The principal deities are the Sun, and a supernatural being known as _Napi_ "Old Man," who may be an incarnation of the same idea. The religious activity of a Blackfoot consists in putting himself into a position where the cosmic power will take pity upon him and give him something in return. There was no conception of a single personal god[840]. The Arapaho, another Algonquian Plains tribe, were once according to their own traditions a sedentary agricultural people far to the north of their present range, apparently in North Minnesota. They have been closely associated with the Cheyenne for many generations[841]. The annual Sun Dance is their greatest tribal ceremony, and they were active propagators of the ghost-dance religion of the last century which centred in the belief in the coming of a messiah and the restoration of the country to the Indians[842]. The Cheyenne, also of agricultural origin, have been for generations a typical prairie tribe, living in skin tipis, following the bison over large areas, travelling and fighting on horseback. In character they are proud, contentious, and brave to desperation, with an exceptionally high standard for women. Under the old system they had a council of 44 elective chiefs, of whom four constituted a higher body, with power to elect one of their number as head chief of the tribe. In all councils that concerned the relations with other tribes, one member of the council was appointed to argue as proxy or "devil's advocate" for the alien people. The council of 44 is still symbolised by a bundle of 44 invitation sticks, kept with the sacred medicine-arrows, and formerly sent round when occasion arose to convene the assembly. The four medicine-arrows constitute the tribal palladium which they claim to have had from the beginning of the world. It was exposed once a year with appropriate rites, and is still religiously preserved. No woman, white man, or even mixed blood of the tribe has ever been allowed to come near the sacred arrows. In priestly dignity the keepers of the medicine-arrows and the priests of the Sun dance rites stood first and equal[843].