Walk across the field and you would notice nothing unusual underfoot; the ground is level, the crop unremarkable. The enclosure only becomes legible from the air, where its outline appears as a cropmark, the faint geometric signature of something buried and long since levelled.

Cropmarks form when buried features, such as a ditch or fosse, affect how plants grow above them. A fosse is simply a ditch, often dug as part of a boundary or defensive perimeter, and where one has been filled in over centuries, the soil above it tends to retain more moisture, causing crops to grow fractionally taller or darker green than the surrounding field. Aerial photographs taken under the right conditions, usually during a dry summer when crops are under mild stress, can reveal these differences with surprising clarity. In this case, the photographs show a roughly square enclosure measuring approximately forty metres north to south and forty metres east to west, set on a slight rise in what is otherwise low-lying Wexford farmland. The single fosse that defines it traces out a shape that would have been, at some point, a meaningful boundary around whatever stood or happened within it. Whether it enclosed a settlement, a ceremonial space, or something else entirely, the record does not say.