Letter from Selby, P.J. [Prideaux John] to F.O. Morris, 1837-04-17, Box: 61, Folder: 52. 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/206275 Accessed February 26, 2025.