But though the Shawnees consider the sun the type, if not the essence, of the Great Spirit, many also believe in an evil genius, who makes all sorts of bad things, to counterbalance those made by the Good Spirit. For instance, when the latter made a sheep, a rose, wholesome herbs, etc., the bad spirit matched them with a wolf, a thorn, poisonous plants, and the like. They also appear to think there is a kind of purgatory in which the spirits of the wicked may be cleansed before entering into their elysium.

Commerce of the Prairies (1831–1839), Chapter 28 Aborigines Of America