Lansdowne Editions ["John Gould the Bird Man"], 1983 - 1991, Box: 21, Folder: 72-79. 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/204767 Accessed January 26, 2025.