Callander, J Graham. 1913. “Notices of (1) A Bronze Socketed Axe from Daviot, Aberdeenshire, and (2) A Stone Mould for Casting Whorls, from Insch, Aberdeenshire, With (3) Notes on Lead Whorls, Lead Brooches, and Button Moulds”. Proceedings of the Society of Antiquaries of Scotland 47 (November):450-62. https://doi.org/10.9750/PSAS.047.450.462.