Irvine, J.T. 1898. Notes on Sepulchral Cairns discovered by the blowing of sand on the Sands of Bracon; and on the Sculptured Stone discovered at South Garth, Island of Yell, Shetland. Proceedings of the Society of Antiquaries of Scotland. 32, (Nov. 1898), 171–174. DOI:https://doi.org/10.9750/PSAS.032.171.174.