Sir George Clerk [of Penicuick, 6th bart (1787-1867)], Admiralty, [London], to J. Spottiswoode Esqr, 16 Gt George Street, Westminster, [London], March 21, 1828, Box: 1, Folder: 15. Spottiswoode & Robertson collection, MS 186. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/248810 Accessed December 11, 2024.