Transcript, "Survey of ... Red River, January 10, 1876 - January 24, 1876," Hunnius' first survey, Box: 1, Folder: 2. Carl Julius Adolph Hunnius papers, RH MS 153. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/52552 Accessed July 14, 2025.