“Notice of Two Ancient Silver Chalices, and a Silver Basin, belonging to the Parish of Forgue, Aberdeenshire, and of their Donors, James Crichton of Frendraught, and his son, the Viscount Frendraught”, PSAS, vol. 10, pp. 91–109, Nov. 1873, doi: 10.9750/PSAS.010.91.109.