¹⁹De Vismes Kane, W.F. "Additional Researches on the Black Pig's Dyke." Proceedings of the Royal Irish Academy. Section C: Archaeology, Celtic Studies, History, Linguistics, Literature 33 (1916-1917): 544-45.
Kane acknowledges that manuscript sources and local folklore confirm the traditional site of the pillar stone outside the village of Rathiddy, in Co. Louth.