““One government study estimated that before 1925 guardians had pilfered at least $8 million directly from the restricted accounts of their Osage wards. “The blackest chapter in the history of this State will be the Indian guardianship over these estates,” an Osage leader said, adding, “There has been millions—not thousands—but millions of dollars of many of the Osages dissipated and spent by the guardians themselves.””