Somewhere in the undulating pastureland of County Waterford, a circle of grass about twenty-five metres across sits quietly in a field, defined by a low bank and hedge running roughly north-east to south-west. What makes it quietly odd is not its size or its shape, but what it was made to do administratively: by the time the Ordnance Survey mapped this part of Ireland at six inches to the mile in 1840, the enclosure's boundary had been absorbed into the townland boundary dividing Ballyduff to the north-east and south-east. An ancient earthwork, in other words, had been pressed into service as a property line.

Embanked enclosures of this kind are scattered across the Irish landscape, the grass-grown remains of circular earthworks whose original purposes ranged from settlement and farming to ritual use. They are broadly comparable to the ringfort, the most common archaeological monument type in Ireland, though without excavation it is rarely possible to say with certainty what any individual example was built for or when. Here the external diameter measured between roughly twenty-five and thirty metres, placing it at the smaller end of the scale. The fact that the 1840 Ordnance Survey cartographers recorded it at all suggests it was still legible as a feature in the landscape at that point, its low bank intact enough to be worth noting as a boundary marker.