Found in: National Library of Scotland Archives and Manuscripts Division / Correspondence and papers of the Mackenzies of Delvine and their clients. / Letters and papers of the Mackenzies of Delvine. / Letters and papers of, to and concerning John Mackenzie, Writer to the Signet, son of John Mackenzie, Advocate. / Papers of John Mackenzie, Writer to the Signet, and of various clients (not represented in MSS.1229-1489).