Letter to George Simpson, with a draft of his proposal for an annual collection of Public General Statutes relating to Scotland., 1847, MS.30009, folios 67-68, 82-83. 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/28812 Accessed September 23, 2024.