“Notes on the Excavation of ’Kenny’s Cairn,’ on the Hill of Bruan; Carn Righ, Year Yarhouse; the Warth Hill Cairn, Duncansbay; And Several Smaller Sepulchral Cairns in Caithness”. 1871. Proceedings of the Society of Antiquaries of Scotland 9 (November): 292-96. https://doi.org/10.9750/PSAS.009.292.296.