Letters from Seebohm, Henry to Henry Stevenson, 1877-12 - 1878-01, Box: 62, Folder: 7. 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/206284 Accessed February 17, 2025.