"Bernard Quaritch's General Catalogue". "John Gould's Ornithological Library," "Mr. Eyton's Collection of Ornithological Illustrations", Box: 17, Folder: 62. 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/204624 Accessed October 14, 2024.