This primary source comes from the Records of the Office of the Chief Signal Officer.
National Archives Identifier:
524930Full Citation: Confederate dead behind stone wall. The 6th. Maine Inf. penetrated the Confederate lines at this point. Fredericksburg, VA; ca. 1861 - 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/confederate-dead-behind-stone-wall-fredericksburg-va, March 28, 2024]