"John Gould the Bird Man: Correspondence, Volume I with a Chronology of his Life and Works", edited and compiled by Gordon C. Sauer, with the assistance of Ann Datta, Box: 38, Folder: 53-60. 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/206041 Accessed November 24, 2024.