Handwritten letter from H. Ruffner(Headquarters, Department of the Missouri, Office of the Chief Engineer, Fort Leavenworth, Kansas), May 26, 1873, to the commanding officer, Fort Lyon, regarding mapping assistance of Perrine and other scouts, Box: 1, Folder: 10. Papers of Henry P. Perrine, 6th U. S. Cavalry Regiment, RH MS 563. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/57890 Accessed September 20, 2024.