What the maps recorded was a curved or arc-shaped bank, roughly 35 metres in circumference, oriented northwest to southeast. It is the kind of feature that passes unnoticed by most people who walk past it, yet accumulates a surprisingly layered paper trail before it disappears entirely from the landscape.

The earthwork was captured on the six-inch Ordnance Survey maps of both 1905 and 1937, depicted with hachuring, the small lines surveyors use to indicate the slope of a raised bank. Aerial photography later added more detail. A photograph taken in July 1975 showed the arc still standing as an upstanding bank, clearly visible from above. A second aerial photograph, taken at a different time and under different ground conditions, revealed something the ground survey alone could not: a cropmark showing not one but two wide banks separated by an intervening fosse, which is a ditch dug between earthwork banks, a common feature of prehistoric and early medieval enclosures in Ireland. A natural rock outcrop about a metre high at the northwest end appears to have been incorporated into the bank's structure, which suggests the builders used what the landscape offered rather than working against it. Local information records that the feature was levelled in 1983, leaving the maps, the aerial photographs, and a small rock outcrop as the principal evidence that it ever existed.