It is not especially large, roughly a metre high and a metre and a half across, and to a passing eye it might look like any other glacial erratic, a boulder carried and deposited by ice long ago, far from its geological origin. But cut into a recessed shelf at one corner of its flat upper surface is a carefully incised cross, just over thirty centimetres tall, formed from triple lines with splayed terminals. That detail changes everything about how you read the stone.

This is a mass-rock, a category of site that belongs specifically to the Penal era in Ireland, when Catholic worship was suppressed under a series of laws introduced in the late seventeenth and early eighteenth centuries. Priests who celebrated Mass risked transportation or execution, and congregations gathered instead at remote outdoor locations, often using a flat stone as an improvised altar. The cross carved here, modest in scale but deliberate in its making, marks this boulder as one of those altar stones. Local tradition recorded in the Ordnance Survey Field Memoirs holds that soldiers threw the rock into the stream below at some point, an act of deliberate desecration that fits the broader pattern of Penal-era suppression in Wexford. It was recovered and restored to its original position in 1973. The stone does not appear on any Ordnance Survey mapping until the 1940 edition of the six-inch map, which suggests either that its significance was quietly known but unrecorded, or that it had simply been overlooked by earlier surveyors. Mass is still celebrated at the rock each year, on the Monday closest to the feast of St. James, the 25th of July, a continuity of use that stretches the life of this small carved stone across several centuries.