Smith, J.A. 1874. 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, (Nov. 1874), 141–151. DOI:https://doi.org/10.9750/PSAS.010.141.151.