Photograph of a metal sign for the Osage Agency that reads "Established 1872. Agency village named for Chief Pa-hu-ska, well known in Osage history. By Act of Congress, 1906, tribe retained ownership of minerals in the reservation lands. Discovery of oil later made the 2,229 alloted Osages the richest Indian tribe. Notable chiefs were James Bigheart, Bacon Rind, Fred Lookout."