The 1834 edition of the Ordnance Survey six-inch map marks a small circular enclosure here, roughly twenty to twenty-five metres across, labelled in the gothic lettering the surveyors reserved for antiquities: "fort". Today, in the same field, there is nothing to see. The pasture gives no hint of a ring, a bank, or a ditch.

The word "fort" in this Irish context almost certainly refers to a rath or ringfort, a type of enclosed farmstead typically dating from the early medieval period, roughly 500 to 1000 AD. These earthworks, usually defined by one or more circular earthen banks, were the most common form of rural settlement in early Ireland, and thousands survive across the country in varying states of preservation. The one at Slieveroe does not appear to be among them, at least not visibly. What the OS surveyors recorded in 1834 may have been a low, already-eroded remnant, or a feature that was subsequently levelled by agricultural activity in the intervening two centuries. The drumlin landscape of south Ulster, with its short rounded ridges shaped by glacial deposition, was intensively farmed, and earthworks in pasture were frequently cleared to improve workable ground.

What remains, then, is essentially a cartographic ghost: a place recorded, named, and classified at a particular moment in the nineteenth century, and now traceable only through the map that captured it.