At Gilcagh in County Cork, there is nothing to see: no stone, no socket hole, no depression in the turf. The only evidence that anything ever stood here is a single mark on the Ordnance Survey six-inch map of 1842, where a draughtsman noted the presence of a standing stone. At some point between that survey and the present day, the stone was removed, leaving no visible trace on the surface.

Standing stones are among the most enigmatic monuments in the Irish landscape. Erected across a broad span of prehistoric periods, they served purposes that remain largely a matter of speculation, ranging from boundary markers and memorial stones to features associated with ritual or astronomical observation. The 1842 Ordnance Survey, the first systematic large-scale mapping of Ireland, recorded many such stones that have since disappeared, lost to agricultural improvement, road-building, or simple reuse as building material. The Gilcagh stone belongs to this quiet category of erasure, known only because a nineteenth-century surveyor thought it worth recording.