Anderson, J. (1875) “Notice of a Small Figure in Jet of St James the Greater, recently presented to the Museum by James Gibson Craig, Esq., FSA Scot.: and probably a Signaculum worn by a Leprous Pilgrim to St Jago Di Compostella; with Notes on ’Pilgrims’ Signs’ of the Middle Ages, and a Stone Mould for casting Leaden Tokens, found at Dundrennan Abbey”, Proceedings of the Society of Antiquaries of Scotland, 11, pp. 62–80. doi: 10.9750/PSAS.011.62.80.