Sir Ilay Campbell [of Succoth (1734-1823)], Garscube, [Dumbartonshire], to Messrs Spottiswoode Robertson, Sackville Street, London, March 29, 1815, Box: 1, Folder: 11. Spottiswoode & Robertson collection, MS 186. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/248806 Accessed December 11, 2024.