This primary source comes from the Records of the Office of the Chief Signal Officer.
National Archives Identifier:
531103Full Citation: 'Return of Casey's scouts from the fight at Wounded Knee, 1890--91.' Soldiers on horseback plod through the snow; ca. 1891; Records of the Office of the Chief Signal Officer, Record Group 111. [Online Version, https://docsteach.org/documents/document/return-of-caseys-scouts-from-the-fight-at-wounded-knee-189091-soldiers-on-horseback-plod-through-the-snow, January 13, 2025]