The feature appeared on the 1944 to 1945 revision of the Ordnance Survey six-inch map marked with hachures, the short radiating lines surveyors used to suggest a raised or sunken landform. That notation implied something worth recording, perhaps the outline of an older, more significant earthwork. When the site was examined on the ground in 1984, however, the depression turned out to be a disused gravel pit, almost certainly dug out after 1700, its edges long since softened by grass and time into something that, from a cartographer's perspective, had begun to resemble something older than it actually was.

There is a quiet kind of interest in that gap between appearance and reality. The pit itself is unremarkable in origin, the sort of small extractive feature that would have been dug to supply local construction or road maintenance with loose aggregate. What gives it a trace of peculiarity is the way the landscape absorbed it. Shorn of its working life and left to the slow processes of pasture and weather, it became ambiguous enough that a printed map treated it as a feature deserving of notation, and a researcher felt it worth investigating nearly forty years later.