Near the townland boundary between Duntryleague and Newtown, a network of ancient field divisions lies invisible at ground level, yet reveals itself clearly from above as a grid of linear cropmarks, lines formed where buried features cause vegetation to grow differently from the surrounding soil, running perpendicular to each other across an area roughly 450 metres north to south and 250 metres east to west. It never appeared on the Ordnance Survey's six-inch maps, which means it passed unrecorded through the great age of Irish cartography entirely.

The field system first came to attention through an unlikely source: aerial photographs taken on 3 November 1984 as part of a survey conducted for the Bórd Gáis Éireann Curraleigh West to Limerick gas pipeline. Catalogued as Site 3/29 in that survey, the cropmark evidence was interpreted as a possible medieval field system, though the presence of a barrow in the north-east quadrant of the site raises the possibility of a much older association. A barrow, in this context, is a burial mound of prehistoric origin, and its proximity to the field boundaries hints that the landscape here may have layers of activity spanning several periods. The site was later confirmed through Digital Globe orthoimages taken between 2011 and 2013 and through Google Earth imagery, both of which show the perpendicular pattern of enclosures with reasonable clarity. The record was compiled by Fiona Rooney and uploaded to the national monuments database in September 2021.

Because the features are subsurface, there is nothing obvious to see at ground level, and the land is in private agricultural use. The most productive way to engage with this site is through the aerial and satellite imagery available via the National Monuments Service viewer or Google Earth, where the cropmark grid becomes legible in the right light and season. Cropmarks tend to show most sharply during dry summers, when stressed vegetation above buried ditches or banks contrasts with the growth around it. The associated barrow, recorded separately in the national monuments record under LI049-060002, is the one feature that may have some physical presence in the landscape, and its position in the north-east part of the field system gives a fixed point of reference when reading the aerial images.