Macadam, W.I. 1880. Notice, with Analyses, of a Series of Church Tokens of various Parishes; of the Collection Plates belonging to the church of Duddingston and the Trinity College Church of Edinburgh; and of the Trinity College Church Hospital Bell. Proceedings of the Society of Antiquaries of Scotland. 14, (Nov. 1880), 163–169. DOI:https://doi.org/10.9750/PSAS.014.163.169.