Sketchbook of Lieutenant-General G H Hutton containing rough sketches, with notes, of various buildings and architectural features, together with a few ground-plans., 1816-1818., Adv.MS.30.5.18. Notebooks and sketchbooks compiled by, and architectural plans and drawings made by and for Lieutenant-General G H Hutton in his researches into the ecclesiastical antiquities of Scotland., Adv.MSS.30.5.1-30.5.28. National Library of Scotland Archives and Manuscripts Division. https://manuscripts.nls.uk/repositories/2/archival_objects/17706 Accessed April 24, 2024.