"John Gould the Bird Man: Correspondence, Volume 5, 1852 through 1857, With a Chronology of his Life and Works", edited and compiled by Gordon C. Sauer, with the assistance of Ann Datta, Box: 43, Folder: 1-6. 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/206071 Accessed June 02, 2024.