“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”. 1874. Proceedings of the Society of Antiquaries of Scotland 10 (November): 141-51. https://doi.org/10.9750/PSAS.010.141.151.