Ledger of John Richardson and Company concerning fishing., 1806-1807., MS.20871. Surviving office books of the fishing, fish curing, and shipping enterprise of the Richardson family of Pitfour; with two ledgers of Pitfour estate and some Richardson family papers., MSS.20801-20987. National Library of Scotland Archives and Manuscripts Division. https://nlssb.as.atlas-sys.com/repositories/2/archival_objects/45310 Accessed September 23, 2024.