Near Aughnaheela in County Tipperary, a fulacht fia, the term for a type of prehistoric cooking or hot-water site typically identified by a horseshoe-shaped mound of fire-cracked stone beside a marshy hollow, was marked on the Ordnance Survey six-inch map, suggesting that someone, at some point, believed they had located one. When investigators went to check, there was nothing there to find.

The discrepancy was formally noted in 1991, when Andrew Ryan reported to the Sites and Monuments Record that no physical evidence of the feature could be located in the area indicated on the map. Fulachtaí fia are among the most common prehistoric monument types in Ireland, and their absence where one was expected is not necessarily dramatic, as mounds of this kind can be levelled by ploughing, eroded over centuries, or simply misidentified in the first place. What lingers here is the small bureaucratic trace of a thing that probably never existed, or no longer does, preserved in the record precisely because someone went looking and found nothing.