Letter from Gould, John to W.A.T. Amhurst[sic][William Amhurst Tyssen Amherst], 1859-12-28, Box: 61, Folder: 38. 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/206261 Accessed July 26, 2024.