Studio portrait of Nellie Robertson, Etta Robertson, and Adelia Lowe, all wearing school uniforms. People Robertson, Nellie Robertson, Etta Lowe, Adelia Nation Sioux Sioux (Oglala) Time Period 1880-1889 Repository National Anthropological Archives, Smithsonian Institution Location NAA 74094; Photo Lot 81-12 06886500 Format Glass Plate Negative Photographer John N. Choate, Carlisle, PA