Medicine Cloud, Reprint of F.A. RINEHART Photo. More than five hundred American Indians from thirty-five tribes attended the 1898 Trans-Mississippi and International Exposition in Omaha, Nebraska. American ethnographer James Mooney (1868-1921) of the U.S. Bureau of Ethnology hired Omaha native Rinehart to photograph the tribal delegates. h. 25" w. 19" Medicine Cloud, Reprint of F.A. RINEHART Photo. More than five hundred American Indians from thirty-five tribes attended the 1898 Trans-Mississippi and International Exposition in Omaha, Nebraska. American ethnographer James Mooney (1868-1921) of the U.S. Bureau of Ethnology hired Omaha native Rinehart to photograph the tribal delegates. h. 25" w. 19"