What makes this particular site quietly unsettling is not its age or its obscurity but the precision with which its disappearance can be tracked, monument and landscape dissolving together within a documented span of decades.

The enclosure first appears on the Ordnance Survey six-inch map of 1839, drawn as a polygon of five unequal straight sides, roughly 60 metres east to west and about 65 metres on its longer north-north-west to south-south-east axis. Inside, occupying much of the north-western portion, sat a small wooded square enclosure, the kind of planted or managed space that often signals a place of some local significance. At the south-eastern angle, a lime kiln marked the edge of the monument. Lime kilns were working agricultural structures, used to burn limestone and produce quicklime for fertilising fields and mortaring walls, and their presence beside older earthworks is not unusual; farmland has always been layered with the practical and the historical sitting side by side. By the time the OS revisited the site in 1947, the shape had already shifted. The map now showed a roughly oval enclosure, somewhat reduced, with the western and north-western sector no longer legible, and field boundaries pressing in around what remained. Then, between 1947 and 2005, satellite imagery reveals the final stage: the monument was levelled entirely, and the field boundaries to the south and west went with it, the whole landscape smoothed into something that gives no indication of what had been there.