The Ordnance Survey six-inch maps record a circular enclosure roughly forty metres across at this spot, the kind of trace that on paper looks orderly and complete. On the ground, the reality is considerably less tidy: the monument has been bulldozed, and the rubble from surrounding field-clearance has been heaped on top of whatever once stood here, burying the evidence beneath a mound of displaced stone and compacted earth.

What makes the site worth pausing over is what the rubble itself implies. Among the debris, large boulders are still visible, and their presence points toward a particular type of structure. A cashel is a ringfort built from stone rather than from earthen banks and ditches, the dry-stone equivalent of the more familiar earthwork enclosures that dot the Irish countryside in their thousands. They were typically farmsteads of the early medieval period, the enclosed homesteads of farming families of middling status, and they survive in greatest numbers across the west of Ireland where stone was the obvious building material. The boulders showing through the spoil at Manuslynn suggest that this was one such cashel before clearance work removed it from the landscape. Ninety metres to the north-north-east, a separate earthwork survives, a quiet reminder that such monuments rarely stood in isolation but formed part of a broader pattern of early settlement across the land.