This one is remarkable for what does not. At Cloonawillin in County Mayo, the Ordnance Survey's six-inch map of 1838 recorded a circular enclosure somewhere between 25 and 30 metres in diameter, the kind of dimensions consistent with a rath, the earthen-banked farmstead enclosures that were built across Ireland in their thousands during the early medieval period. By the time the revised six-inch edition appeared in 1929, it was already gone from the map, and the ground itself is now occupied by a commercial quarry.

Raths, sometimes called ringforts, were the everyday settlements of early medieval Irish farming families, typically comprising a raised circular bank of earth or stone enclosing a living area. Tens of thousands once existed across the island, and they remain among the most common monument types in the Irish landscape, though many have been lost to agriculture, development, and neglect over the centuries. The Cloonawillin example sits in that larger pattern of disappearance, its outline captured in the nineteenth-century mapping record and then quietly erased between one survey and the next. Whether it was levelled for farmland before the quarry arrived, or removed as part of quarrying operations, is not clear from what survives in the documentary record. What is certain is that no physical trace remains.