"John Gould the Bird Man: Correspondence with a Chronology of His Life and Works" Volume 1, through, 1838, Box: 37, Folder: 55-60. 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/206029 Accessed June 26, 2024.