Opera is My Hobby - "William Tell" (series VII, n. 201); "Das Lied von der Erde" (series VII, n. 202); "The Creation" (series VII, n. 203); The Career and Art of Jacques Urlus (series VII, n. 203a), Box: 11, Folder: 21. Personal Papers of James E. Seaver, PP 534. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/163592 Accessed May 17, 2024.