In a pasture in Ballinlyna, County Limerick, a prehistoric pillar stone that once marked the western edge of an enclosure has apparently vanished from the landscape entirely, with no surface remains visible on aerial imagery taken between 2011 and 2013. What remains, in a sense, is only the record of its existence, an absence where something once stood upright and purposeful.

The stone appears on the Cassini edition of the Ordnance Survey six-inch map, annotated simply as "Pillar Stone" and shown at the western edge of what was then a levelled enclosure. Its position was also documented by Grogan in 1989, listed under the townland of Ballynlyna Lower. The enclosure itself, a levelled cliff-edge fort recorded under the reference LI056-015002-, sits immediately to the east-northeast of where the stone once stood. Cliff-edge forts are a distinctive category of Irish prehistoric or early medieval monument, typically defined by a rampart cutting across a promontory or elevated edge, with the natural drop providing defence on one or more sides. That this particular example has been levelled, and that the pillar stone associated with it has disappeared, suggests a landscape that has been quietly worked over across many centuries of agricultural use. The site sits immediately north of the townland boundary with Clovers, a detail that may itself be a faint echo of older territorial divisions, since standing stones were sometimes used to mark boundaries in the prehistoric and early medieval periods.

For anyone curious enough to seek the location out, the site is agricultural pasture and access would require landowner permission. There is, by current evidence, nothing to see at ground level, which makes this less a destination than a point of reflection on how much has been lost simply through the ordinary business of farming. The Cassini-edition Ordnance Survey map, available through the OSi historical map viewer, remains the clearest record of what was once there.