Captured in a single aerial photograph, these linear ridges represent what archaeologists call cultivation ridges, the raised strips of earth thrown up by repeated ploughing or hand-digging across the same furrows over many seasons. They are the kind of feature that passes entirely unnoticed at ground level, blending into the ordinary undulations of a field, yet from above they resolve into something unmistakably deliberate, a ghostly grid pressed into the soil by generations of agricultural labour.