Allen, J.R. 1897. Report on the Photography of the Sculptured Stones earlier than A.D. 1100, in the District of Scotland south of the river Dee; obtained under the Jubilee Gift of His Excellency Dr. R. H. Gunning, LL.D., F.S.A. Scot. Proceedings of the Society of Antiquaries of Scotland. 31, (Nov. 1897), 147–152. DOI:https://doi.org/10.9750/PSAS.031.147.152.