Accounts sheet detailing sums of money owed to Blackwood`s London Office by various booksellers., ? 1842., MS.30074, folios 45-46. 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/33803 Accessed September 23, 2024.