This one, in the reclaimed pasture land near Duntryleague in County Limerick, was found from the air, and only reveals itself clearly when viewed from above. It does not appear on the Ordnance Survey Ireland six-inch maps, the detailed series that recorded Irish topography from the nineteenth century onwards, which means it passed unnoticed through generations of formal mapping. What eventually gave it away was a cropmark, the faint differential in vegetation colour and growth that betrays buried features beneath the soil, most visible during dry summers when buried ditches, which retain moisture longer than the surrounding ground, leave their outline in the grass or grain above them.

The monument came to light in aerial photographs taken on 3 November 1984 as part of the Bórd Gáis Éireann Curraleigh West-Limerick gas pipeline survey, shot at a scale of 1:5000. In those images, the earthwork appears as a circular cropmark defined by a fosse, the term used for a ditch that typically enclosed a settlement or ceremonial site in early medieval or prehistoric Ireland. The circle measures approximately 29 metres in diameter. Later satellite imagery, from a Digital Globe orthoimage taken between 2011 and 2013 and from Google Earth, confirmed the cropmark is still visible, though its northern arc is truncated by a relic field boundary running roughly north-northwest to south-southeast, a remnant land division that at some point cut across whatever was originally a complete enclosure. Two further earthworks lie to the northwest, at distances of roughly 140 metres and 75 metres respectively, suggesting this part of the landscape holds more than one episode of earlier activity beneath its present-day appearance. The record was compiled by Fiona Rooney and uploaded to the national monuments database in September 2021.

Because the monument is visible primarily as a cropmark rather than as a physical earthwork, there is little to see at ground level. The site sits within a working field system, so access would require landowner permission. The most legible views remain those from aerial or satellite platforms, and the Google Earth imagery noted in the record is publicly accessible for anyone wanting to trace the outline themselves. Dry spells in late spring or summer offer the best conditions for cropmarks to become visible in person or in contemporary aerial photography, should the opportunity arise.