It is the kind of feature that a walker could step over without a second thought, and yet the modest swell of earth marks a boundary that is almost certainly centuries old.

The enclosure was recorded on the 1846 Ordnance Survey six-inch map as a roughly circular feature approximately 25 metres in diameter, positioned at the junction of four fields. That meeting point of field boundaries suggests the enclosure was already ancient enough by the mid-nineteenth century to have become a fixed reference point in the local landscape, the kind of thing farmers worked around rather than through. By the time the next major survey was carried out, between 1893 and 1894, something had changed. The south-eastern and south-western arcs of the enclosure had been straightened and absorbed into the surrounding field boundary system, the old curve quietly erased in favour of more practical right angles. Later still, those field boundaries themselves were removed, leaving the enclosure with no walls, no ditches, and no clear edges, only a low elevation of roughly 20 metres in diameter to betray its presence. The process is a neat illustration of how ancient features disappear, not through any single dramatic act of clearance, but through incremental adjustments made by people who had other things on their minds.