Sir Alex[ander] Don [(died 1826)], Newton Don, [Berwickshire], to My dear sir, May 2, 1821, Box: 1, Folder: 21. Spottiswoode & Robertson collection, MS 186. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/248816 Accessed December 11, 2024.