Notebook of Robert Bruce Armstrong, containing an incomplete index to the material collected., Late 19th century., MS.6119. Letters and papers of Robert Bruce Armstrong, chiefly concerning the collection of material for the unpublished continuation of his ‘The history of Liddesdale, Eskdale, Ewesdale, Wauchopedale and the Debateable Land’., MSS.6110-6120.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://nlssb.as.atlas-sys.com/repositories/2/archival_objects/12643 Accessed September 24, 2024.