J. G. Callander, “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”, PSAS, vol. 47, pp. 450–462, Nov. 1913.