Logan, George. “Notice of an Urn and Other Sepulchral Remains, &C., Discovered in the Windy-Goul, on Arthur’s Seat, in Cutting the New Road from Edinburgh to the Village of Duddingstone”. Proceedings of the Society of Antiquaries of Scotland, vol. 2, Nov. 1859, pp. 420-2, doi:10.9750/PSAS.002.420.422.