That uncertainty is not a gap in the record so much as the whole point. What appears on aerial photography as a possible enclosure, the kind of roughly circular or rectilinear earthwork that can indicate early settlement, a ringfort, or a field boundary of considerable age, might instead be the ghost of a quarry that was dug out, expanded, and then quietly filled back in sometime between the mid-nineteenth and mid-twentieth centuries.

The feature came to light during aerial surveys carried out by Bord Gáis in the early 1980s, as part of the preliminary groundwork for the Cork to Dublin gas pipeline. That kind of infrastructure project, moving at speed across the Irish countryside, incidentally produced a body of aerial photographic evidence that archaeologists have been picking over ever since. When researchers compared what the camera had captured with earlier mapping, they found a small quarry marked with trees around its edge on the first edition Ordnance Survey six-inch map of 1839, sitting roughly in the north-western quadrant of the feature. By the time the six-inch map was revised in 1947, that quarry had vanished from the record entirely, suggesting it had been in-filled at some point in the intervening century. Whether the original quarry was larger than the 1839 map recorded, whether it was later extended and then levelled, or whether any of this has any bearing on a genuinely older enclosure beneath it, remains unresolved.

What lingers is the layering of it: a possible prehistoric or early medieval boundary, a Victorian quarry, a mid-century infilling, and then a gas company's camera catching something in the soil that raised the question again.