This one in the townland of Boherduff, County Limerick, exists mainly as an absence, a faint rectangular ghost pressed into improved pasture that has spent decades being drained, divided, and farmed into near-illegibility. It has never appeared on any Ordnance Survey Ireland historic map, and on a Google Earth image taken in June 2018 it could not be detected at all. The site survives in the record largely because a single aerial survey happened to fly over it at the right moment.

That moment came in 1986, during the Bruff aerial photographic survey, when the enclosure showed up as a rectangular cropmark, catalogued as Bruff 167 (AP 4/3693). Cropmarks, for those unfamiliar with the term, form when buried features such as walls, ditches, or banks affect how vegetation grows above them, with buried stonework sometimes stunting crops and infilled ditches sometimes encouraging them, producing patterns visible only from the air and only under particular conditions of moisture and growth. Between 2011 and 2013, Digital Globe orthophotos revealed a faint trace of a rectangular earthwork still surviving at ground level, anchored in part by existing field boundaries along its western and northern sides. The monument sits on low-lying ground to the immediate east of the townland boundary with Gortboy, cut through by land drains and watercourses that suggest this area has been heavily managed for a long time. The record was compiled by Alison McQueen and Vera Rahilly and uploaded in September 2020.

Visitors hoping to see something obvious on the ground are likely to be disappointed, and that is rather the point. What survives here is not a ruin in any conventional sense but a faint earthwork partially defined by hedgerow and field boundary, identifiable mainly by knowing what to look for and where. The site sits on private farmland, so any visit would require landowner permission. The most useful way to approach it is via the aerial survey record rather than in person, comparing the 1986 cropmark image against more recent orthophotos to appreciate how thoroughly a feature can recede from view across a few decades of agricultural improvement.