This primary source comes from the Records of the Office of the Chief Signal Officer.
National Archives Identifier:
529170Full Citation: Artillery soldier with cannon; ca. 1860 - ca. 1865; Mathew Brady Photographs of Civil War-Era Personalities and Scenes, 1921 - 1940; Records of the Office of the Chief Signal Officer, Record Group 111. [Online Version, https://www.docsteach.org/documents/document/artillery-soldier-with-cannon, April 19, 2024]