Letters, mostly to William Erskine, the historian, part 3., 1790-1832, and undated., Adv.MS.36.1.6. 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/16481 Accessed September 25, 2024.