“Account of the Excavation of the Camps and Earthworks at Birrenswark Hill in Annandale, undertaken by the Society in 1898: (II) Account of the Excavations at Birrenswark and Description of the Plans and Sections”, PSAS, vol. 33, pp. 219–243, Nov. 1899, doi: 10.9750/PSAS.033.219.243.