Marked proof, "Prospectus and specimen of an intended National Work ... Intended to comprise the most interesting particulars relating to King Arthur and his Round Table", by William and Robert Whistlecraft [i.e. John Hookham Frere]; with the manuscript of the same., 1813, 1817., MS.42586. Archive of John Murray, publishers., MSS.40001-43564. National Library of Scotland Archives and Manuscripts Division. https://nlssb.as.atlas-sys.com/repositories/2/archival_objects/20033 Accessed September 24, 2024.