It carries the name of a saint, it appears on Ordnance Survey maps stretching back to 1839, it is rendered in the solemn gothic lettering typically reserved for sites of religious significance, and yet there is no evidence whatsoever that anyone ever came here to pray, leave offerings, or seek a cure. For a country where holy wells were once among the most densely layered features of the devotional landscape, that silence is curious.

The well itself is a natural pond, roughly eight metres across, and its saintly name presumably derives from the parish church of St. Margaret's, which once stood somewhere to the east. That church no longer exists. The sea took it. The coastline in this part of County Wexford has been subject to erosion and encroachment over centuries, and the loss of the church to the water explains why the dedication survives only in the name of this marshy pond rather than in any standing building. The well appears on both the 1839 and 1924 editions of the six-inch Ordnance Survey map, suggesting that whatever tradition, if any, once attached to it had already faded well before those surveys were made, or perhaps never properly formed at all. It may simply be that the name transferred from the lost church to the nearest named feature on the landscape, a cartographic inheritance rather than a devotional one.