That omission alone is enough to give pause. The OS six-inch series, surveyed across Ireland from the 1830s onwards, was remarkably thorough in recording earthworks and enclosures across the landscape. To have escaped that record entirely suggests either that the feature was missed, already too degraded to catch a surveyor's eye, or that it had been misread as a natural undulation in terrain that was, in any case, never easy ground to read.

What survives today is a semicircular arc of earthen bank, roughly 33 metres along its longer axis, the bank itself broad and slumped, standing only about half a metre above the interior ground level. Enclosures of this general type, typically circular earthen ringforts, were built in their thousands across Ireland during the early medieval period, roughly the fifth to twelfth centuries, and served as the enclosed farmsteads of farming families. This one has lost its southwestern arc entirely: a modern road, running along the townland boundary between Esker South and Scardaun East, appears to have cut straight through it, leaving the straight edge now defined by a field drain and fence rather than any original bank. The interior sits at a slightly lower level than the surrounding ground, damp and soft underfoot, with a gap of about two metres in the bank at the north that may represent an original entrance. Across the road to the southwest, a low linear rise of about 16 metres runs parallel to the fence line, but it is narrower than the main bank and does not curve in the way one might expect from a surviving fragment of the enclosure's missing arc, leaving its relationship to the enclosure genuinely uncertain.