"John Gould the Bird Man: Correspondence with a Chronology of His Life and Works", Volume 1, edited and compiled by Gordon C. Sauer, with the assistance of Ann Datta, revision through 1831, 1987 - 1988, Box: 38, Folder: 24-26. 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/206034 Accessed November 24, 2024.