Letters, mostly to William Erskine, the historian, part 2., 1806-1823, and undated., Adv.MS.36.1.5(Part 2), folios 204-437. Letters, mostly to William Erskine, the historian., Adv.MSS.36.1.5-36.1.7B. National Library of Scotland Archives and Manuscripts Division. https://nlssb.as.atlas-sys.com/repositories/2/archival_objects/16485 Accessed September 25, 2024.