- Maintained by: Sons of Union Veterans of the Civil War
- Originally Created by: Bev
- Added: 28 Mar 2007
- Find A Grave Memorial 18665486
Find A Grave, database and images (https://www.findagrave.com : accessed ), memorial page for Pvt John Callahan (unknown–7 Jun 1864), Find A Grave Memorial no. 18665486, citing Andersonville National Cemetery, Andersonville National Historic Site, Macon County, Georgia, USA ; Maintained by Sons of Union Veterans of the Civil War (contributor 48353502) .