Anderson, Joseph. “Notice of a Highland Brooch in Silver, Ornamented With Niello, Exhibited by Mr T S Omond; And of Other Highland Brooches in Silver and Brass”. Proceedings of the Society of Antiquaries of Scotland 33 (November 30, 1899): 57–67. Accessed April 25, 2024. https://journals.socantscot.org/index.php/psas/article/view/6728.