Anderson, J. 1899. 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, (Nov. 1899), 57–67. DOI:https://doi.org/10.9750/PSAS.033.57.67.