Sir Ilay Campbell [of Succoth (1734-1823)], Garscube, [Dumbartonshire], to Messrs Spottiswoode Robertson, Sackville Street, London, September 29, 1808, Box: 1, Folder: 9. Spottiswoode & Robertson collection, MS 186. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/248804 Accessed December 11, 2024.