Receipt to John A. Blackwood for his contribution towards the Building Fund and Life Membership of the Scottish Conservative Club, Edinburgh, issued by John Borrowman., 1877, MS.30034, folio 273. Papers of William Blackwood and Sons., MSS.30001-30984. National Library of Scotland Archives and Manuscripts Division. https://nlssb.as.atlas-sys.com/repositories/2/archival_objects/30804 Accessed September 23, 2024.