Piggott, Cecily Margaret, M I Platt, M Y Orr, F S Wallis, and A F Hallimond. 1950. “The Excavations at Hownam Rings, Roxburghshire, 1948”. Proceedings of the Society of Antiquaries of Scotland 82 (November):193-225. https://doi.org/10.9750/PSAS.082.193.225.