It might be a boundary cairn, marking the edge of one territorial unit from another. It might be something far older, the remnant of a megalithic tomb. What is certain is that local tradition has long settled on a third explanation entirely: that the stones were placed, one by one, by passers-by over the body of a highwayman killed on this spot.

The site is known in Irish as Tuaim an Fhir Mhóir, meaning the Big Man's Grave, a name recorded as 'Tuamanirvore' on the 1840 edition of the Ordnance Survey six-inch map. The Ordnance Survey Letters, a remarkable series of nineteenth-century field notes compiled by scholars travelling Ireland to document place names and antiquities, describe it as sitting in the south-west corner of the townland, at the boundary with Glanstale, which is the older form of Glenstal. The account, quoted by O'Flanagan in 1929, characterises it plainly: a small heap of stones thrown together by passers-by, as it was said, over the remains of a highway man who was killed there. The same Irish name, Tuaim an Fhir Mhóir, is also applied to a separate wedge tomb in the townland of Cappanahannagh, within half a mile to the north. Wedge tombs are a type of prehistoric megalithic burial monument, typically consisting of a stone chamber that narrows towards one end, and they are relatively common in Munster. The wider landscape here is thick with such structures: a wedge tomb lies in the nearby townland of Garranbane, and a court tomb, another prehistoric monument type defined by a semi-circular forecourt of standing stones, sits across the county boundary in Shanballyedmond, Co. Tipperary.

The cairn sits at a townland boundary on the upland fringe, which means the approach involves open, often boggy ground on the Slievefelim foothills. Townland boundaries in Ireland frequently follow ancient landscape features, ridges, streams, or pre-existing earthworks, and a cairn positioned precisely on such a boundary may have served a marking function quite independent of any burial. Visitors exploring the area should expect rough underfoot conditions and limited signage; the site is not formally managed or interpreted. The surrounding landscape repays attention in its own right, given the density of prehistoric remains within a short radius, and anyone with an interest in the archaeology will find it worth cross-referencing the national monuments records before heading out.