Coles, F. R. (1897) “Notices (I.) Of the Discovery of a Cist and Bronze Blade at Letham Quarry, Perth; (II.) of the Standing Stones at High Auchenlarie, Anwoth, Kirkcudbrightshire”, Proceedings of the Society of Antiquaries of Scotland, 31, pp. 181–188. doi: 10.9750/PSAS.031.181.188.