This one, in the townland of Caherelly East in County Limerick, revealed itself only from the air, a ghostly outline pressed into farmland and invisible to anyone walking past at ground level. It belongs to a category of monument that archaeology has come to rely on aerial survey to find at all, the kind of enclosure whose earthworks have been so thoroughly flattened by centuries of ploughing and grazing that only the differential growth of crops above buried ditches and banks betrays that anything was ever there.

The record for this site was created by The Discovery Programme, the Irish state-funded body established to investigate the country's archaeological heritage, and it derives from medium-altitude aerial photographs taken in 1986. Those photographs were analysed as part of the Ballyhoura Hills Project, a systematic survey of a region straddling south County Limerick and north County Cork, documented by M. Doody in a 2008 monograph published by Wordwell as part of the Discovery Programme's own series. The project catalogued a wide range of monuments across this upland and lowland zone, and the Caherelly East enclosure sits within that broader record under the reference LI023: Bruff 175: AP 4/3690. An enclosure, in Irish archaeological terms, typically refers to a defined area bounded by a ditch, bank, or wall, and such features appear across many periods from the prehistoric through to the early medieval, serving purposes that range from settlement and agriculture to ritual use.

Because the site was identified through aerial photography rather than ground survey, there is no visible feature to seek out on a visit to Caherelly East. The enclosure exists, in practical terms, as a record in a monograph and an archive photograph rather than as something a person can stand inside or beside. What a visit to this part of County Limerick does offer is the landscape context that made the Ballyhoura Hills Project worthwhile in the first place, a quietly varied terrain where the evidence of long human occupation tends to lie beneath the surface rather than above it, legible only to those who know what patterns to look for, and at what altitude.