Thomson, W. (1832) “An Account of the Ancient Crosier of St Fillans, described in a Letter from William Thomson, A.M. Student of Christ Church, in Oxford, to the Earl of Buchan”, Archaeologia Scotica, 3, pp. 289–291. Available at: https://journals.socantscot.org/index.php/arch-scot/article/view/235 (Accessed: 20 April 2024).