Black, George F. “Report on the Antiquties Found in Scotland, and Preserved in the British Museum, &c., London, and in the Museum of Science and Art, Edinburgh; Obtained under the Jubilee Gift of His Excellency Dr. R. H. Gunning, F.S.A. Scot”. Proceedings of the Society of Antiquaries of Scotland 27 (November 30, 1893): 347–368. Accessed November 22, 2024. https://journals.socantscot.org/index.php/psas/article/view/6522.