Duns, Professor. “Notes on Some Articles Exhibited to the Meeting, Viz. – A Bronze Spear-Head, a Small Unlooped Socketed Celt, a Sword-Shaped Stone from Shetland, and a Tripod Bronze Pot”. Proceedings of the Society of Antiquaries of Scotland, vol. 11, Nov. 1875, pp. 168-71, doi:10.9750/PSAS.011.168.171.