This primary source comes from the Records of the Office of the Chief Signal Officer.
National Archives Identifier:
524432Full Citation: 111-B-14; Ruins of Richmond, Virginia; Mathew Brady Photographs of Civil War-Era Personalities and Scenes, 1921–1940; Records of the Office of the Chief Signal Officer, Record Group 111; National Archives at College Park, College Park, MD. [Online Version, https://docsteach.org/documents/document/ruins-of-richmond-virginia, January 13, 2025]