Kinghorn, G. 1895. Notes on the Discovery of a Deposit of Polished Stone Axes and Oval Knives of Porphyry, &c., at Modesty, near Bridge of Walls, Shetland. Proceedings of the Society of Antiquaries of Scotland. 29, (Nov. 1895), 48–54. DOI:https://doi.org/10.9750/PSAS.029.48.54.