At Lisloughlin, on a low rise in County Galway, an enclosure was recorded on the third edition of the Ordnance Survey six-inch map in 1932, roughly circular and approximately forty metres across. Nothing of it can be seen today. No earthwork, no ditch line, no crop mark visible to the passing eye. The site endures only as a cartographic memory, a circle drawn by a surveyor who saw something, or knew something, that has since been entirely erased.

Circular enclosures of this kind are scattered across the Irish landscape and tend to belong to a broad tradition of enclosed settlements stretching back through the early medieval period and beyond. They were typically defined by an earthen bank and ditch, sometimes with a timber palisade, enclosing a farmstead or a small cluster of buildings. The choice of elevated ground, even a modest summit like this one, was practical rather than defensive in any grand sense: it offered drainage, visibility, and a degree of separation from the surrounding terrain. Whether this particular enclosure at Lisloughlin was recorded in the field by the 1932 surveyors because earthworks were still faintly legible at that time, or whether the mapping drew on older local knowledge, is not clear. What is clear is that by the time the site was assessed for the Archaeological Inventory of County Galway, published in 1999 and compiled by Olive Alcock, Kathy de hÓra, and Paul Gosling, no surface trace survived at all.