“Notice of Cup-Marked Stones and Curing Well on the Estate of Garth, Fortingall, Perthshire. With Drawings”. Proceedings of the Society of Antiquaries of Scotland 20 (November 30, 1886): 41–47. Accessed February 4, 2026. https://journals.socantscot.org/index.php/psas/article/view/6178.