It sounds straightforward enough, but this cairn, a deliberate accumulation of stones used as a landmark or territorial marker, has slipped through the documentary record in ways that make its age and origins genuinely unclear. It does not appear on the Ordnance Survey maps of either 1836 or 1876, which means that if the Victorian cartographers knew it existed, they did not think it worth recording, or perhaps they simply never encountered it.

The absence from those early OS editions is the most interesting thing about it. The first Ordnance Survey of Ireland, carried out in the 1830s, was a meticulous exercise that recorded townland boundaries, field patterns, and a great deal of archaeological material. Something that fails to appear on that survey, and again on the revised edition four decades later, raises quiet questions. Boundary cairns of this kind were sometimes ancient landmarks pressed back into practical service by later communities, and sometimes they were informal arrangements with no particular antiquity at all. Without a visit or excavation, there is no way to say which this one is. The working assumption is that it functioned as a boundary marker, sitting on the county line itself, but that is about as far as the available evidence goes.