Fort Leavenworth Fortifications, 1827 / Fort Hays Blockhouse, 1864-1867 / Fort Harker Guardhouse, 1864-1867, Box: 4, Folder: 39. Early Kansas architecture photographs, RH PH 178(f). University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/422151 Accessed April 20, 2024.