At Bramblestown, a trapezoidal enclosure, roughly 24 metres north to south and narrowing from about 20 metres at its northern end to 12 metres at the south, appeared clearly on the first edition Ordnance Survey six-inch map of 1839. Enclosures of this kind are common enough in the Irish landscape, often the remnants of early medieval farmsteads or ecclesiastical sites, defined by an earthen bank or stone wall that separated a settled space from the wider agricultural ground. What makes this one quietly interesting is less what it was than the pace at which it disappeared.

By the time the 1900 revision of the same map was produced, the enclosure itself had gone unrecorded. What remained was a field boundary running roughly along the line where a trackway had once skirted the western edge of the enclosure, with a slight kink in that boundary still echoing the original western arc. The 1839 map also shows a quarry pressing up against the eastern edge of the enclosure and a sand pit sitting to its north, which suggests the surrounding land was being worked intensively even at the time of the first survey. Whether extraction activity contributed to the enclosure's disappearance, or whether it was simply absorbed into the reorganised field system over the intervening decades, is not recorded. By June 2005, when satellite imagery captured the area, even that boundary, with its telltale kink, had been levelled out of the landscape entirely.

What survives now is essentially cartographic. The 1839 map preserves the outline, the proportions, the neighbouring quarry and sand pit, and the trackway that once ran beside it. Without that first edition survey, there would be nothing to indicate that anything particular ever stood here at all.