It exists now only as a cropmark, the kind of faint differential growth in a cereal crop that, when photographed from the air on the right dry summer day, outlines the buried remains of something that once mattered enough to build. The shape it leaves is a D, flat on the eastern side where an older field boundary appears to have cut across it, the curved western arc still legible from altitude even though nothing protrudes above the soil.

The site has an unlucky history. Neither the first-edition Ordnance Survey map of 1839 nor its 1900 revision recorded it, possibly because it sat within a large tree plantation that obscured it from surveyors working at ground level. By 1962 it was described simply as a mound in correspondence connected with a Land Project scheme administered by the Office of Public Works, and shortly afterwards it was levelled. The physical feature was gone. Then, in July 1971, an aerial photograph taken as part of the Cambridge University Committee for Aerial Photography survey, reference CUCAP BGN094, caught the cropmark of the enclosure and brought it back into the record. The photograph also revealed a much larger, irregularly shaped enclosure surrounding it, roughly 120 metres on its northeast to southwest axis and about 60 metres across, which may represent a related field system. That outer enclosure extends further still, with what appears to be an additional stretch of around 100 metres running northeast on the opposite side of the public road.