The circular enclosure at Longford Wood has been levelled, its contours smoothed into the surrounding farmland within living memory, known now only because the landowner remembers it being there.

Circular enclosures of this kind are among the most common archaeological features in the Irish landscape. They are typically the remains of a ringfort, a raised or ditched enclosure used for settlement and farming in the early medieval period, roughly between the fifth and twelfth centuries. What makes this particular site quietly puzzling is its absence from the first edition Ordnance Survey six-inch map of 1840, which was generally thorough in recording earthworks of this type. It appears, apparently as a distinct circular feature, only on the 1904 edition, along with a companion enclosure roughly 25 metres to the north-east. Whether both were already degraded by 1840, or whether the cartographers simply missed them, is unclear. The land has since been reclaimed for agriculture, and the site is not visible at ground level.