Roughly twenty-five metres in diameter, it cannot be seen at ground level today, yet it was considered distinct enough to be recorded on the first edition six-inch Ordnance Survey map of 1838, where it appears marked with hachures, the small radiating lines cartographers used to indicate the raised banks or earthen walls of an enclosure. By the time the revised six-inch map was produced in 1907, it had vanished from the record entirely.

Circular enclosures of this kind are a familiar feature of the Irish countryside, typically associated with early medieval settlement, though without excavation it is rarely possible to say precisely what any individual example was used for. They range from domestic ringforts, which were the farmsteads of farmers and minor landowners, to enclosures with religious or funerary functions. What makes the Quigginroe example quietly interesting is the gap between its two cartographic appearances. The 1838 surveyors saw something worth recording; their successors nearly seventy years later either could not find it or judged it no longer warranted inclusion. Whether that reflects a genuine change on the ground, perhaps the levelling of a bank for agricultural purposes, or simply a difference in surveying priorities, is not known. What remains is a circle on an old map, and the faint suggestion that the slope beneath it holds something that once, at least, was considered worth marking.