Curle, A.O. 1948. The Excavation of the ’Wag’ or Prehistoric Cattle-fold at Forse, Caithness, and the Relation of ’Wags’ to Brochs, and implications arising therefrom. Proceedings of the Society of Antiquaries of Scotland. 80, (Nov. 1948), 11–25. DOI:https://doi.org/10.9750/PSAS.080.11.25.