This primary source comes from the Records of the Office of the Chief Signal Officer.
National Archives Identifier:
531112Full Citation: Umapine (Wakonkonwelasonmi), a Cayuse chief; full-length, standing, wearing a feathered head-dress; 9/1909; Records of the Office of the Chief Signal Officer, Record Group 111. [Online Version, https://www.docsteach.org/documents/document/umapine-wakonkonwelasonmi-a-cayuse-chief-fulllength-standing-wearing-a-feathered-headdress, April 27, 2025]