Papers of Alexander Walker and his family concerning family and estate affairs., [Circa 1780]-1907, undated., MSS.13961-14193. Correspondence and papers, private and official, of Brigadier-General Alexander Walker., MSS.13601-14193. National Library of Scotland Archives and Manuscripts Division. https://nlssb.as.atlas-sys.com/repositories/2/archival_objects/34609 Accessed September 23, 2024.