John Gould: The Bird Man, A Chronology and Bibliography by Gordon C. Sauer, Copy 2, Box: 5, Folder: 8-19. Sauer's Gouldiana Research about John Gould and other papers, MS 304. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/204162 Accessed May 26, 2024.