The local name for the area is "Bishop's Island", a detail that carries considerable weight given what mass-rocks represent: flat or roughly level stones used as improvised altars during the Penal Laws, when Catholic worship was suppressed under eighteenth-century legislation and priests were forced to conduct Mass outdoors, away from roads and settlements, with lookouts posted against the approach of authorities. The name "Bishop's Island" suggests the spot held particular religious significance, perhaps associated with a senior cleric who used it, though nothing more specific is recorded.

What makes this site quietly unusual is precisely its elusiveness. It exists in the historical record, tied to a named location with a named local identity, and yet the rock itself has not been located by those who went looking. This is not uncommon with mass-rocks; they were deliberately chosen for their inconspicuousness, often indistinguishable from surrounding outcrop once the practice that gave them meaning ceased. The boggy ground and rocky terrain at the Foherish bend would have served that purpose well, offering both natural concealment and the kind of marginal, uncultivated land that drew little official attention. What remains is the name, the bend in the river, and the knowledge that people once gathered here in circumstances that required considerable care.