No ridge, no ditch, no change in the grass gives it away at ground level. The only way to know it is there at all is to look down from the air.

The system came to attention through aerial photography, specifically an OS image catalogued as photograph 2432, in which linear divisions emerge clearly enough to trace the outlines of small, discrete fields. Aerial photography can reveal features like this because differential moisture retention or soil composition, legacies of buried banks or filled ditches, causes subtle variations in crop or grass growth that the eye on the ground simply cannot detect. The fact that no edition of the Ordnance Survey six-inch map ever recorded these boundaries suggests they were already gone from the visible landscape by the time systematic mapping began in the nineteenth century, leaving no surface trace and no cartographic memory. What survives is effectively a ghost of an agricultural landscape, its age and original function unrecorded, preserved only as a faint chemical signature in the soil beneath modern pasture.