The collection consists of twenty-two silver gelatin photographs of a delegation of Yankton Sioux Indians that visited Washington (D.C.) in March 1904. The delegation consisted of Thunder Horse, Yellow Horse, Eugene Bruno, Edward Oshie, White Swan, Not-Afraid-of-Pawnee, Iron Bear, Big Tobacco, and His Hoop. There is an image of the entire delegation taken on the roof of the Arts and Industries building of the Smithsonian Institution (the two men dressed in Western clothing are not identified). Also included are three 8.7" x 7.2" studio photographs of the members of the delegation grouped in threes, and 9" x 7" studio portraits of each member, showing a frontal and profile view, with names and dates inscribed on the verso. These latter photogtraphs were done to note the anthropometric features of each member. The photographs are mounted on 13" x 9.7" grey card stock, with negative numbers written in ink on the bottom right hand corner of each image.