"John Gould's Ability as an Ornithological Artist" by Gordon C. Sauer, Box: 43, Folder: 10-16. 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/206073 Accessed November 24, 2024.