"Our hero's hairbreadth escapes", photostat from page proof, Philadelphia Press, December 9, 1906, Folder: F, item: 4. Charles William Kahles letters, cartoons, biographical information, photographs, RH MS 124. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/103157 Accessed May 20, 2024.