That name is the most tangible thing left. Walk the pasture today, overlooking the Ferta river to the north, and there is nothing to see, no earthwork, no rise in the ground, no stones arranged in an arc. Whatever once defined this as a distinct and bounded space has been entirely absorbed into the surrounding farmland.

The designation 'enclosure' covers a wide range of prehistoric and early medieval structures in the Irish landscape, from simple ringforts used as defended farmsteads to ceremonial or ritual enclosures whose purposes are less easily categorised. What survives at Deelis is the memory of shape. Local tradition recalls it as a circular structure, which aligns with what the cartographers of the first Ordnance Survey recorded in the nineteenth century when they gave the field its Irish placename. That name, 'Gortnaruga', preserved in the map even as the physical form was disappearing, suggests the feature was still legible, or at least remembered, at the time of surveying. The field-name itself became the archaeological record once the archaeology was gone.