This one is notable for what almost certainly does not. On a south-westerly facing slope in the mountainous terrain of Curryquin in County Tipperary, a cairn was once recorded, the kind of prehistoric stone mound typically raised over burials or as a territorial marker on high ground. By the time researchers came to verify its precise location, the land had apparently been improved, the agricultural term for drainage, levelling, and reseeding that has reshaped so much of the Irish uplands over the past century. No visible remains were found.

The site's existence is known because it was plotted on the Ordnance Survey six-inch map, those meticulous mid-nineteenth century sheets that captured Ireland's landscape before large-scale agricultural change accelerated across the twentieth century. The OS six-inch series recorded not just roads and field boundaries but antiquities, often based on local knowledge gathered during the original surveys. That a cairn appeared on the map suggests it was a recognisable feature within living memory of those surveyors. Whether it was subsequently cleared deliberately, absorbed into land drainage schemes, or simply quarried for stone is unknown. Jean Farrelly and Caimin O'Brien documented its probable loss in their 2002 archaeological inventory of North Tipperary, a methodical county-by-county attempt to account for sites that may have already slipped beyond recovery.

There is nothing to see at Curryquin today, and that absence is itself part of the record. The slope remains, the mountain terrain remains, but the cairn, if it ever stood intact into the modern era, is gone. Its entry persists in the archaeological literature as a placeholder for something that was once worth marking on a map and is now worth mourning in a footnote.