On a west-facing slope above the Multeen river valley in the uplands of County Tipperary, an enclosure once stood at Foilaclug, and today nothing of it can be seen at ground level. No earthwork, no raised bank, no hollow in the grass. The only proof of its existence comes from aerial photographs taken in April 1974, when the cropmarks or soil patterns visible from above betrayed the ghost of a boundary that has long since sunk beneath the surface.

Enclosures of this type are broadly understood as defined areas set apart by a bank, ditch, or wall, and they appear throughout the Irish landscape in a range of forms and periods. The Foilaclug example sits on sloping upland ground, a position that would have offered a degree of natural advantage, looking out westward over the Multeen valley below. A ringfort, a type of enclosed farmstead common in early medieval Ireland, lies to the north-west, suggesting that this area of upland Tipperary saw sustained activity over time. Whether the enclosure and the ringfort were contemporary, or belong to entirely different periods of use, the notes do not say. What can be said is that the two features share a landscape, and that the enclosure, unlike its neighbour, has left no trace a walker would ever notice.