Mackay, A. 1906. Notes on a Slab with Incised Crescentic Design, Stone Mould for casting Spear-heads, a Cup-marked Stone, Holy-water Stoup, and other Antiquities in Strathnaver, Sutherlandshire. Proceedings of the Society of Antiquaries of Scotland. 40, (Nov. 1906), 128–133. DOI:https://doi.org/10.9750/PSAS.040.128.133.