General retour of Robert Dalrymple Horn as heir to his elder brother, Hugh Horn., 1747., Acc.6275/44. Papers, including correspondence, financial documents, plans, reports and related material, concerning the estates of Foxhall and Avoncrook., Acc.6275/1-133. National Library of Scotland Archives and Manuscripts Division. https://manuscripts.nls.uk/repositories/2/archival_objects/128302 Accessed May 17, 2024.