"From Colin Richardson Booksellers, 26 Charing Cross Road, London W.C.2. No. 6 of batch of 9"

"From Colin Richardson Booksellers, 26 Charing Cross Road, London W.C.2. No. 6 of batch of 9", Box: 7, Folder: 4G:45. Sotheby Family Papers, MS 4. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/262069 Accessed December 24, 2025.