At Cahermoyle in County Limerick, the Ordnance Survey's six-inch map of 1841 records a D-shaped enclosure sitting on a westward-facing slope, measuring roughly fifty metres from north to south and the same from east to west. It is a substantial footprint, the kind of enclosed space that would once have been unmistakable in the landscape. Today, standing in the same pasture, there is nothing to see at all.

Enclosures of this general type are scattered across the Irish countryside and are typically associated with early medieval settlement, functioning as defended or delineated spaces around a dwelling or farmstead. The curving, roughly D-shaped plan is a recognisable form in Irish archaeology, often interpreted as a ringfort variant adapted to local topography or the preferences of whoever had it built. The Cahermoyle example was recorded on the 1841 Ordnance Survey six-inch map, which means it was at least partially visible at that time, its outline clear enough to be surveyed and committed to paper. At some point between that survey and the inspection recorded by Denis Power, the monument was levelled. His notes, uploaded in August 2011, are unambiguous: no trace of the monument was evident when inspected.

For anyone visiting Cahermoyle with the old map in hand, the exercise is a lesson in agricultural erasure. The land here is working pasture, and the gradual processes of ploughing, drainage improvement, and field clearance have, over generations, smoothed away what the nineteenth-century surveyors still thought worth recording. The WSW-facing slope break where the enclosure once sat can still be read in the general lie of the ground, and that topographical logic, a sheltered position catching afternoon light on a sloping field edge, is itself a reminder of why someone chose to build here in the first place. The enclosure is gone, but the reasoning behind its placement is still legible, quietly, in the shape of the land.