Account book of John Mackenzie, Writer to the Signet, titled 'Book of Expence', containing personal, family, and household expenses., 1757-1761., MS.1189. Correspondence and papers of the Mackenzies of Delvine and their clients., MSS.1101-1530. National Library of Scotland Archives and Manuscripts Division. https://nlssb.as.atlas-sys.com/repositories/2/archival_objects/48262 Accessed September 23, 2024.