Curle, Alexander O. “Account of the Examination of a Relic Bed on the Mote of Ingleston, Kelton Parish, Kirkcudbright, from Which Was Recovered a Padlock of Tubular Form; And a Note of Similar Padlocks Preserved in the National Museum of Antiquities”. Proceedings of the Society of Antiquaries of Scotland, vol. 46, Nov. 1912, pp. 189-00, doi:10.9750/PSAS.046.189.200.