Stuart, John. “Notice of Letters Addressed to Captain Shand, R.A., by Professor Thorkelin and General Robert Melvill, on Roman Antiquities in the North of Scotland, 1788-1790”. Proceedings of the Society of Antiquaries of Scotland 7 (November 30, 1867): 26–34. Accessed December 4, 2024. https://journals.socantscot.org/index.php/psas/article/view/5309.