Cairns used in this way are essentially heaped mounds of stone, often ancient in origin but pressed into later administrative service as waymarkers along territorial lines. What makes this particular cairn quietly interesting is that, despite being recorded on a map, nobody has been able to confirm it is actually still there.

The cairn is one of five recorded near the top of Carron Mountain, all of them shown on the 1937 Ordnance Survey six-inch map and understood to have functioned together as boundary markers along the Cork-Limerick border. Using prominent natural high ground to anchor county or parish boundaries was common practice in Ireland, and earlier prehistoric cairns were frequently repurposed for exactly this kind of administrative demarcation, their visibility and permanence making them convenient fixed points. Whether these particular cairns were built specifically as boundary markers or inherited from an earlier landscape is not recorded. What is recorded is that this one, at least, has not been located in the field.