At Rusheens in County Galway, on the north-eastern foot of a low hill surrounded by ordinary farmland, there is recorded an enclosure that can no longer be seen at all. No earthwork, no raised ground, no trace of a boundary survives above the surface. What we know comes entirely from the first edition of the Ordnance Survey six-inch map, where a small oval outline, roughly fifteen metres by ten metres, was carefully drawn in solid line by surveyors working in the nineteenth century. That map, in other words, is now the only physical record that anything was ever there.

Enclosures of this general kind, small and oval or roughly circular, appear across Ireland in considerable variety. Some were farmsteads, some had ritual or funerary functions, and many remain difficult to date or categorise without excavation. The Ordnance Survey's first edition mapping, carried out from the 1820s onwards, captured many features that were already low and fading at the time, which is part of what makes those maps so valuable to archaeologists. At Rusheens, whatever boundary once defined this modest oval, whether a bank of earth, a stone wall, or a combination of both, had apparently disappeared entirely from the landscape by the time modern records caught up with it. The site sits at the kind of transitional position, between hill slope and low-lying ground, that often marks older patterns of settlement or land use in the west of Ireland.