“Descriptive List of Antiquities near Loch Etive, Argyllshire, consisting of Vitrified Forts, Cairns, Circles, Crannogs, &c.; with some Remarks on the Growth of Peat”, PSAS, vol. 9, pp. 81–106, Nov. 1872, doi: 10.9750/PSAS.009.81.106.