Copies of letters of John Churchill, First Duke of Marlborough, the majority to the King of Prussia, with some to the Prince Royal of Prussia, the Graf von Wartenberg, and Field-Marshal von Grumbkow., 1702-1711., Adv.MS.46.9.28. Correspondence and papers of General Sir George Murray., Adv.MSS.46.1.1-46.10.2. National Library of Scotland Archives and Manuscripts Division. https://nlssb.as.atlas-sys.com/repositories/2/archival_objects/16582 Accessed September 23, 2024.