The 1932 edition of the Ordnance Survey six-inch map records it as 'Clash-an-Aifrinn Sand Pit', a name that contains the Irish word for Mass. That detail alone points to something deliberate about this location, and the small stone cross still standing there confirms it. The structure sits on a rectangular mortared limestone altar, modest in its dimensions, with the cross itself barely reaching knee height above its base. Plain and round in section, it is not the kind of monument that announces itself.

What gives the site its particular character is the inscription on the north face of the cross's base, which commemorates a 'P. P. O'Conor' and carries the date 1680. The initials P. P. most likely indicate a Parish Priest, which places this stone in the period of the Penal Laws, when Catholic worship was heavily suppressed in Ireland and Mass was frequently celebrated outdoors at informal gathering points known as Mass rocks. The upper face of the base is carved with the outline of a chalice and host, the central objects of the Catholic Eucharist, a quiet but deliberate declaration of what this hollow was used for. That a permanent marker was erected at all, and that it was dated and inscribed with a name, suggests either unusual boldness or that the stone was added when conditions allowed, perhaps as a retrospective commemoration rather than a contemporary one. Either way, the physical object that survives is small, specific, and quietly loaded with the circumstances of its making.