The field sits on a broad, gentle rise surrounded by low-lying wet ground, the kind of slight elevation that early medieval farmers and community leaders chose deliberately when constructing a ringfort, a roughly circular enclosure defined by earthen banks and ditches that served variously as a defended farmstead, a marker of status, or a boundary of domestic space. At this particular spot, the enclosure has been so thoroughly erased that only a faint cropmark, a ghostly difference in vegetation growth caused by buried earthworks affecting soil moisture and nutrients, was barely detectable on aerial photography taken in November 2011.

The maps tell the story of a slow disappearance. When the Ordnance Survey recorded the area in 1837, the fort appeared on both the Fair Plan and the six-inch map as a circular or sub-circular enclosure, explicitly annotated as a fort. By the time the revised twenty-five-inch Ordnance Survey map was produced in 1911, hachuring, the cartographic convention used to indicate upstanding earthworks, covered only the western half of the monument. Sometime between those two surveys, the eastern half was levelled, most likely by agricultural improvement. The western portion presumably followed later, leaving no surface trace whatsoever. What the 1837 mapmakers walked around and noted down had, within roughly three generations, been reduced to a smudge visible only from the air under the right seasonal conditions.