"Letts's No 9 Diary", 1860, Volume: 36. Papers of Lady Pauline Trevelyan, 1827-1866, and other family members, 1809-1879, Great Britain and Europe, MS C133. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/215541 Accessed June 15, 2025.