This primary source comes from the Records of the Office of the Chief Signal Officer.
National Archives Identifier:
528788Full Citation: Ruins in Charleston, S.C; ca. 1860-1865; 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/ruins-in-charleston-sc-column, February 7, 2025]