Look more carefully, and the curve is too deliberate, too consistent, tracing out a rough circle roughly 45 metres across from north to south. What lies beneath that wall is the real point of interest: the faint ghost of a much older enclosure, its original fabric almost entirely absorbed into the agricultural landscape around it.

Enclosures of this kind are among the most common, and most quietly enigmatic, features of the Irish countryside. Typically circular or subcircular in plan, they were formed by a bank, wall, or ditch, and served any number of purposes across many centuries, from settlement and farming to ritual use. At Menlough, the enclosing element itself has largely vanished, with only faint traces remaining visible on the ground. A later field wall was built along the same line, probably making use of whatever stone or earthwork was already there, which is a common enough fate for such sites in areas where building material was scarce and boundaries were practical necessities. A gap on the south-western side may represent the original entrance, though its condition makes certainty difficult. The karst terrain, a landscape of exposed limestone, thin soils, and irregular surface features, adds its own complications to reading what survives.