“Notice of a Jet Necklace and Urn of the Food-Vessel Type, found in a Cist at Balcalk, Tealing, and of the opening of Hatton Cairn, Parish of Inverarity, Forfarshire”, PSAS, vol. 14, pp. 260–267, Nov. 1880, doi: 10.9750/PSAS.014.260.267.