The first edition Ordnance Survey six-inch map, produced in the nineteenth century at a time when surveyors were methodically recording features that local knowledge still recognised, shows a faint circular form roughly twelve metres across at Coolgreany. When someone eventually went to look for it on the ground, there was nothing to see.

Circular enclosures of this scale are a familiar category in the Irish archaeological record. They range from the remains of ringforts, which were enclosed farmsteads typically dating from the early medieval period, to much older prehistoric boundaries whose original purpose is harder to read. A twelve-metre diameter would be on the small side for a ringfort, but not impossible. Whatever this particular feature once was, it has since been absorbed into the landscape entirely. The field is flat and reclaimed, and a substantial range of modern farm buildings now stands at or just east of the location the old map recorded. The ridge itself still commands wide views in all directions, which may say something about why someone once chose to build or settle here, even if the evidence of that choice has long since disappeared beneath ploughed soil and concrete footings.