This one, on a low hillock in Springhouse, County Tipperary, leaves almost nothing to see at all. What is known about it comes not from fieldwork but from the sky: a single aerial photograph taken by the Geological Survey of Ireland on 16 April 1974 caught a faint outline in the landscape, the kind of mark that only shows up under particular conditions of light, crop growth, or soil moisture. At ground level, there is nothing. The enclosure, if that is what it is, remains a ghost in the grass.

An enclosure, in the Irish archaeological sense, typically refers to a defined area bounded by an earthwork, a bank, a ditch, or some combination of these, and can date from the prehistoric period through to the medieval. They served many purposes: settlement, ritual, agricultural containment. The Springhouse example remains tentative, its function and date entirely unknown. What the aerial record does confirm is its position, a hillock with a good outlook over the valley to the north, the kind of elevated, well-oriented spot that people across many centuries tended to choose deliberately. A second enclosure, a separate and apparently more securely identified site, lies roughly 200 metres to the south, which at least suggests this corner of Tipperary had some sustained pattern of activity worth investigating further.