Frazer, W. 1893. Notes on Incised Sculpturings on Stones in the Cairns of Sliabh-na-Calliaghe, near Loughcrew, County Meath, Ireland, with Illustrations from a series of Ground-Plans and Water-Colour Sketches, by the late G V Du Noyer,of the Geological Survey of Ireland. Proceedings of the Society of Antiquaries of Scotland. 27, (Nov. 1893), 294–340. DOI:https://doi.org/10.9750/PSAS.027.294.340.