[1]
Noble, J. 1888. Notice of a Stone, apparently a Sinker, with Incised Figures of Animals, from a Tumulus at Bridge of Brogar, Stennis, Orkney. Proceedings of the Society of Antiquaries of Scotland. 22, (Nov. 1888), 266–267. DOI:https://doi.org/10.9750/PSAS.022.266.267.