Invitation from Mrs. W.B. Yeats to Mr. and Mrs. P.S. O'Hegarty for Exhibition, 1 p, December 4, 1940, Folder: Eb.4, item: 4.11. Yeats family correspondence, MS 25. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/264674 Accessed January 02, 2025.