19Lewis, A.L. Notes on Some Irish Antiquities. The Journal of the Anthropological Institute of Great Britain and Ireland, Vol. 9 (1880): 141-2.
The author considers the suggestions that the stones mark a pagan burial: "The burial of a pagan as such in a Christian cemetery would be another circumstance which would require explanation, but such a shrine as I have imagined might well, after the building of the abbey, have fallen into ruin, and its remains have preserved only such a tradition of their origin as is conveyed in the idea of their marking a pagan's grave; this, however, is at best mere hypothesis, and the stones may not be of great antiquity, but may have derived their name from their unworked condition."
Westropp referred to the structure as a "bone box." (Westropp, Thomas J. “Slane in Bregia, County Meath: Its Friary and Hermitage.” The Journal of the Royal Society of Antiquaries of Ireland, Fifth Series, Vol. 31, No. 4, (Dec. 31, 1901): 418.)
The stones are also called the “Bishop’s Tomb." (Trench, C.E.F. Slane: Slane Town Trail, Newgrange. Slane: An Taisce, 1995, 14-23.)