'Journal of wet and dry days etc at Kirkwall', by an unknown author., 1799-1800., Acc.10069/80. Meteorological records, mostly concerning Scotland and England, collected by the Royal Society of Edinburgh, Robert Mossman and others., Acc.10069/1-114. National Library of Scotland Archives and Manuscripts Division. https://nlssb.as.atlas-sys.com/repositories/2/archival_objects/80635 Accessed September 23, 2024.