Drummond, James. “Notes on Ancient Shields and Highland Targets, One of the Latter Having Embossed Upon It the Cognisance of the Lord of the Isles”. Archaeologia Scotica 5 (November 30, 1891): 213–224. Accessed December 13, 2024. https://journals.socantscot.org/index.php/arch-scot/article/view/317.