"John Gould the Bird Man: Correspondence": dates and key words, preliminary list, compiled by Gordon C. Sauer, 1986, Box: 37, Folder: 27-31. 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/206024 Accessed June 17, 2024.