This primary source comes from the Records of the Office of the Chief Signal Officer.
National Archives Identifier:
530517Full Citation: Army picture gallery; ca. 1860 - 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; National Archives at College Park, College Park, MD. [Online Version, https://www.docsteach.org/documents/document/army-picture-gallery, March 25, 2025]