Map of Texas (excluding the Panhandle), marked by Lady Polwarth with trails worked by Robert Bontine Cunninghame Graham around San Antonio., Undated., Acc.11335/159. Correspondence, notes, literary papers and other papers of the Cunninghame Graham family, mostly of Robert Bontine Cunninghame Graham; and financial and administrative papers relating to Gartmore and Ardoch., Acc.11335/1-227. National Library of Scotland Archives and Manuscripts Division. https://manuscripts.nls.uk/repositories/2/archival_objects/85900 Accessed May 17, 2024.