This primary source comes from the Records of the Office of the Chief Signal Officer.
National Archives Identifier:
530596Full Citation: Gen. and Mrs. George A. Custer; ca. 1860 - ca. 1865 ; Photographic Prints and Negatives of Supplements to the Brady Collection of Civil War Photographs, 1921 - 1921; Records of the Office of the Chief Signal Officer, Record Group 111. [Online Version, https://www.docsteach.org/documents/document/gen-and-mrs-george-a-custer, April 26, 2024]