That is not a figure of speech: the structure, roughly fifty metres in diameter and defined by a scarp rather than an upstanding bank or wall, has been so thoroughly absorbed into the landscape that nothing announces its presence to a passing eye. A modern dwelling now occupies its interior, which means the enclosure is not only invisible but inhabited, a situation that is quietly odd even by the standards of a country where early medieval earthworks routinely underlie farmyards and gardens.

The site was recorded in a 1988 Office of Public Works report, which described the large circular area and its defining scarp, set on high ground in an upland zone. The enclosure sits close to a ringfort, a type of enclosed farmstead typically dating from the early medieval period, roughly the fifth to twelfth centuries, located a short distance to the north. Whether the two features are contemporary or represent different phases of activity on the same favoured elevated ground is not recorded. The term enclosure covers a broad range of circular or subcircular features whose function and date can vary considerably; without excavation, this one keeps its purpose to itself.