Drawings and maps made or collected by Robert Bruce Armstrong to illustrate the volumes of ‘The history of Liddesdale, Eskdale, Ewesdale, Wauchopedale and the Debateable Land’ and its continuation., Circa 1883., MS.6113. Letters and papers of Robert Bruce Armstrong, chiefly concerning the collection of material for the unpublished continuation of his ‘The history of Liddesdale, Eskdale, Ewesdale, Wauchopedale and the Debateable Land’., MSS.6110-6120. National Library of Scotland Archives and Manuscripts Division. https://manuscripts.nls.uk/repositories/2/archival_objects/12607 Accessed May 13, 2024.