No Ordnance Survey map, across any edition of the standard six-inch series, ever recorded it. Its existence is known from a single set of aerial photographs taken by the Geological Survey of Ireland in 1973, in which the cropmarks or soil patterns characteristic of a buried enclosure became briefly, faintly legible from the air.

Aerial archaeology works because buried features, walls, ditches, or filled pits, affect how vegetation grows above them, producing variations in crop height or colour that are invisible at ground level but can be read from above, particularly in dry summers when soil moisture differences become more pronounced. The 1973 GSI flight over this part of Offaly captured what specialists catalogued as a possible enclosure of archaeological significance, referenced under photograph number GSI N 518/7. Enclosures of this kind are common across the Irish midlands, often the remains of early medieval ringforts, the circular farmsteads that once dotted the landscape in their thousands, or occasionally earlier prehistoric boundaries. Whether this one belongs to that tradition, or represents something else entirely, remains unknown. The aerial evidence suggests only that something was built here, at some point, by someone.