This raised platform measures approximately 42 metres northeast to southwest and 40 metres northwest to southeast, surrounded by what appears to be the remains of an old defensive perimeter. The southwestern edge has been absorbed into a modern field boundary, standing about 1.4 metres high on the inside, whilst the northwestern section survives as a subtle rise no more than 30 centimetres tall. The northeastern and southeastern sides are more distinct, marked by scarps roughly 40 centimetres in height.

The site first appeared on official records in 1835, when Ordnance Survey cartographers marked it as a ‘Fort’ in gothic lettering on their six-inch map. Local historian Davies suggested in 1947 that this might be the castle shown at ‘Donmory’ on a Civil Survey map from 1656-8, though the connection remains speculative. He also proposed that the earthwork was once a bawn; a fortified enclosure typically associated with plantation-era castles; and claimed to have identified a large circular flanker tower, nearly nine metres across, at the northeastern corner. However, no trace of this flanker remains visible today.

Without any obvious entrance or defensive ditch (fosse), the site poses something of a puzzle. Its rectangular form and raised interior certainly suggest deliberate construction for defensive purposes, whether as a medieval ringwork, a plantation-period bawn, or perhaps an earlier fortification that was later modified. The incorporation of its southwestern perimeter into the field boundary system shows how these historical sites continue to shape the modern landscape, even as their original purpose fades from memory.