It appears on the 1914 edition of the Ordnance Survey six-inch map, duly noted and plotted, but visit the spot today and there is nothing to see. The bog has either swallowed it entirely or, more likely, it was never much to look at in the first place.

The working assumption is that this was a boundary mound, a small earthen marker erected by the Ordnance Survey itself during its mapping work in Ireland, used to establish or demarcate a territorial line across otherwise featureless ground. Raised bogs, which build up over millennia from compressed peat and sphagnum moss, offer surveyors very little in the way of natural landmarks, and a modest heap of earth or turf would have served as a practical reference point. By the time the 1914 map was printed, the mound was already being recorded as an existing feature; whether it had already begun to sink into the soft ground by then is unknown. It does not appear on earlier or later editions, which places its documented existence in a single cartographic moment.