On a gentle north-east-facing slope at Camlin in County Tipperary, a large enclosure once defined the land in a way that was legible enough to be carefully recorded by Ordnance Survey cartographers in 1840, then quietly vanished from the map altogether by the time the revised edition appeared between 1901 and 1905. Today there is nothing visible underfoot, no bank, no ditch, no break in the grass to suggest that anything was ever here.

What the first-edition six-inch OS map captured was a roughly triangular enclosure outlined by two concentric lines, interpreted as banks, a double-banked boundary of the kind sometimes associated with early medieval settlement or landholding in Ireland. The site sits on a slope that drops away sharply to the north-east, with a stream running roughly north-east to south-west about fifty metres to the north-north-west. At some point a deep drainage gully was cut at the base of the slope, diverting that stream's flow, a piece of land management that may itself have contributed to whatever gradual erasure the enclosure has undergone. Between the 1840 survey and the early twentieth-century revision, the double banks had either been levelled, absorbed into the surrounding field system, or simply missed by later surveyors working at a different moment in the landscape's life.