This primary source comes from the Records of the Office of the Chief Signal Officer.
National Archives Identifier:
527437Full Citation: Admiral Samuel F. Dupont, ca. 1860 - ca. 1865 ; 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; National Archives at College Park, College Park, MD. [Online Version, https://docsteach.org/documents/document/admiral-samuel-f-dupont-ca-1860-ca-1865, September 9, 2024]