Gow, James MacKintosh. “Notes in Balquhidder : Saint Angus, Curing Wells, Cup-Marked Stones, &c”. Proceedings of the Society of Antiquaries of Scotland 21 (November 30, 1887): 83–88. Accessed April 18, 2024. https://journals.socantscot.org/index.php/psas/article/view/6226.