Duplicates - Gould [William] Jardine [correspondence], British Museum of Natural History, 1852, Box: 44, Folder: 50. 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/206101 Accessed June 17, 2024.