Neish, J. (1871). Notes of Stone Celts found in Glenshee, Forfarshire, 1870; and of Clay Cones (Loom Weights) found at Ravensby, Parish of Barrie, Forfarshire. Proceedings of the Society of Antiquaries of Scotland, 9, 174–176. https://doi.org/10.9750/PSAS.009.174.176