“Notice of a Stone Mould for Casting Flat Bronze Axes and Bars Found in the Parish of Insch, Aberdeenshire; With Notes on the Occurrence of Flat Axe Moulds in Europe”. 1904. Proceedings of the Society of Antiquaries of Scotland 38 (November): 487-505. https://doi.org/10.9750/PSAS.038.487.505.