"The great mythic and ceremonial cycles of the American Indian peoples are neither primitive, in any meaningful sense of the word, nor necessarily the province of the folk; much of the literature, in fact, is known only to educated, specialized persons who are privy to the philosophical, mystical, and literary wealth of their own tribe. Much of the literature that was in the keeping of such persons, engraved perfectly and completely in their memories, was not known to most other men and women. Because of this, much literature has been lost as the last initiates of particular tribes and societies within the tribes died, leaving no successors."