Smith, John Alexander. “Notes of Rock Sculpturings of Cups and Concentric Rings, and ’The Witch’s Stone’ on Tormain Hill; Also of Some Early Remains on the Kaimes Hill, &C., Near Ratho, Edinburghshire”. Proceedings of the Society of Antiquaries of Scotland 10 (November 30, 1874): 141–151. Accessed June 24, 2024. https://journals.socantscot.org/index.php/psas/article/view/5658.