In a field in Coolnamohoge, County Limerick, roughly two hundred metres west of a stream and thirty-five metres south of a farmyard, there was once a lime kiln. A lime kiln is a structure, usually stone-built and circular, in which limestone was burned at high temperature to produce quicklime, a material widely used across rural Ireland to improve acidic soils and to make mortar. This one has been gone so long that even its rubble is invisible. What survives is the cartographic record of a thing that no longer survives.

The kiln appears on the 1840 edition of the Ordnance Survey Ireland six-inch map, marked as a small circular feature roughly eight metres in diameter. That mid-nineteenth-century survey was meticulous about agricultural infrastructure, and lime kilns were common enough across the Irish countryside to be mapped with reasonable consistency. By the time the later Cassini edition of the six-inch map was produced, the feature was shown as a mound, most likely representing a grass-covered heap of collapsed rubble, the remnant of a structure that had already been levelled. When satellite imagery from between 2011 and 2013 was examined, no surface trace at all could be identified, either on Digital Globe orthoimages or on Google Earth. Martin Fitzpatrick compiled the record in November 2021, noting the absence as carefully as an earlier surveyor had noted the presence.

There is, in practical terms, nothing to see here, and that is rather the point. The site sits in ordinary pasture, unmarked and unremarkable to any eye not already looking for it. For anyone interested in how the landscape of rural Limerick was worked and managed in the nineteenth century, the value lies in tracing the sequence of maps, watching a working agricultural structure become a mound, then become nothing. The 1840 OSi six-inch maps are freely available through the Ordnance Survey Ireland online portal, and placing the historic sheet beside a current satellite view makes the disappearance legible in a way that a visit to the field itself cannot.