This primary source comes from the Records of the Office of the Chief Signal Officer,.
National Archives Identifier:
525689Full Citation: Capt. Edward P. Doherty, (John Wilkes) Booth's Captor; 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; National Archives at College Park, College Park, MD. [Online Version, https://www.docsteach.org/documents/document/capt-edward-p-doherty-john-wilkes-booths-captor, May 5, 2024]