Index of [Edwin] Prince letters to Gould, 1838-05-31 - 1840-06, Box: 61, Folder: 22-23. 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/206246 Accessed February 16, 2025.