“Notice of the Excavation of the Brochs of Yarhouse, Brounaben, Bowermadden, Old Stirkoke, and Dunbeath, in Caithness, with Remarks on the Period of the Brochs; and an Aplpendix, containing a Collected List of the Brochs of Scotland, and Early Notices of many of them.and an appendix containing a collected list of the brochs of Scotland, and early notices of many of them”, arch-scot, vol. 5, pp. 131–198, Nov. 1891, Accessed: Dec. 10, 2025. [Online]. Available: https://journals.socantscot.org/index.php/arch-scot/article/view/315