Mapleton, R J. “Description of Stockaded Remains Recently Discovered at Arisaig, Inverness-Shire, in a Letter to John Stuart, Esq., Sec.S.A.Scot”. Proceedings of the Society of Antiquaries of Scotland, vol. 7, Nov. 1867, pp. 516-9, doi:10.9750/PSAS.007.516.519.