A circular enclosure roughly twenty metres across, it now announces itself only as a patch of ground that drains slightly better than the boggy earth around it. No earthwork, no stone, no obvious boundary remains. Just a circle of drier soil on a south-east facing slope, quietly holding its shape.

Circular enclosures of this kind are among the most common archaeological features in the Irish landscape. They typically served as enclosed farmsteads or ringforts, the dominant form of rural settlement in early medieval Ireland, where a family or small community would have lived and kept their animals within a raised earthen bank or stone wall. The Cornan example was recorded on the first edition Ordnance Survey six-inch map of 1838, meaning that at least at that point, some physical trace was still legible on the ground. In the century and a half since, whatever earthwork remained has been levelled or absorbed back into the surrounding landscape, leaving only that telltale hydrological ghost: the compacted or disturbed soil of a former bank shedding water in a way the undisturbed ground does not.