When cereal crops are growing, the ground gives nothing away. No earthwork breaks the surface, no bank catches the light. The only way to know something is there at all is to look at a map drawn almost two centuries ago.

The 1839 edition of the Ordnance Survey six-inch map records a subrectangular, or D-shaped, embanked enclosure at the southern edge of a broad plateau, measuring roughly 70 metres east to west and 55 metres north to south. A rath, in Irish archaeological terms, is a circular or near-circular ringfort enclosed by one or more earthen banks and ditches, typically associated with early medieval settlement and farming. Locally, this site has always been remembered as a rath, even as the visible evidence above ground has been lost entirely. That gap between cartographic record and physical reality is not unusual in the Irish midlands and south-east, where centuries of deep ploughing have gradually levelled earthworks that once stood several metres high, leaving only their outlines preserved in the soil chemistry beneath the surface.