Opera is My Hobby - Verdi's "I Due Foscari" (series VII, n. 104); Gonzalo Roig (series VII, n. 105); Massenet's "Jongleur" (series VII, n. 106), Box: 10, Folder: 55. Personal Papers of James E. Seaver, PP 534. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/163571 Accessed June 13, 2024.