Jervise, A. 1858. Notices descriptive of the localities of certain Sculptured Stone Monuments in Forfarshire, &c., - Meigle, Essie, Glamis, Thornton, and Cossins. Part II. Proceedings of the Society of Antiquaries of Scotland. 2, (Nov. 1858), 242–251. DOI:https://doi.org/10.9750/PSAS.002.242.251.