Drafts of the supplemental case of Robert Barclay Allardice claiming the title of Earl of Airth, and other papers with a copy of the claim made by Sir William Scott of Ancrum, 1838., 1835-1839, and undated., Adv.MS.26.1.1a, folios 27-223. Books and papers of John Riddell, the peerage lawyer., Adv.MSS.25.8.1-26.7.37. National Library of Scotland Archives and Manuscripts Division. https://nlssb.as.atlas-sys.com/repositories/2/archival_objects/22763 Accessed September 23, 2024.