Keith letters, including letters, 1758, of William Pitt (afterwards Earl of Chatham), and of the Earl Marischal, the friend of Frederick the Great, 1773, and correspondence, 1845, 1854, of Mrs Gillespie Smyth concerning the family connections of Lieutenant-General Sir Robert Murray Keith, her father., 1758-1854., MS.2617, folios 24-49. Single manuscripts and small collections., MS.2617. National Library of Scotland Archives and Manuscripts Division. https://nlssb.as.atlas-sys.com/repositories/2/archival_objects/35195 Accessed September 28, 2024.