Letter from Gould, John to W.A.T. Amhurst[sic][William Amhurst Tyssen Amherst], 1874-12-29, Box: 61, Folder: 41. 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/206264 Accessed June 02, 2024.