Allen, J.R. 1892. Report on the Sculptured Stones older than A.D. 1100, with Symbols and Celtic Ornament, in the District of Scotland South of the River Dee; obtained under the Victoria Jubilee Gift of His Excellency Dr. R. H. Gunnning, F.S.A. Scot. Proceedings of the Society of Antiquaries of Scotland. 26, (Nov. 1892), 251–259. DOI:https://doi.org/10.9750/PSAS.026.251.259.