Morrison, H. 1885. Notices of the Discovery of a Stone Coffin and Fragment of a Celtic Cross at Lethnott, Forfarshire, and of a Bronze Celt at Durness, Sutherlandshire. Proceedings of the Society of Antiquaries of Scotland. 19, (Nov. 1885), 315–320. DOI:https://doi.org/10.9750/PSAS.019.315.320.