“Memorandum relative to a piece of Ordnance, found 28th March 1856, in the course of excavations by The Royal Engineer Department, at Broughty Castle, Communicated by Lieut Col R C Moody, Royal Engineers” (1858) Proceedings of the Society of Antiquaries of Scotland, 2, pp. 220–222. doi:10.9750/PSAS.002.220.222.