Fotheringhame, W.H. 1854. Notes relating to ’A.Z.,’ The Anonymous correspondent of the Society, by whom the collection of Books and Mss. relating to the Orkney and Shetland Islands, were presented to the Library (see Archaeologia Scotica, vol. iii., p.267.). Proceedings of the Society of Antiquaries of Scotland. 1, (Nov. 1854), 126–127. DOI:https://doi.org/10.9750/PSAS.001.126.127.