This primary source comes from the Records of the Office of the Chief Signal Officer.
National Archives Identifier:
524459Full Citation: Deck of Monitor on James River, Va. 'Onondaga'; 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://docsteach.org/documents/document/deck-of-monitor-on-james-river-va-onondaga, May 2, 2024]