It does not appear on any historic Ordnance Survey Ireland maps, which means it passed unrecorded through generations of official surveying, its presence unknown to any formal archaeological register until relatively recently. That absence alone sets it apart: a monument that survived in the ground while remaining entirely invisible on paper.

The site was identified in 2015 by Hugh Carey, who spotted it while examining Bing aerial photographs, a reminder that some of the most significant archaeological discoveries now happen at a desk rather than in a field. What he noticed was a circular cropmark, the kind of faint but legible signal left when buried features, in this case likely the remains of a barrow, affect the growth of vegetation above them. A barrow is a burial mound, typically dating to the Bronze Age or earlier, and they survive across Ireland in various states, some as earthen mounds, others reduced by centuries of agriculture to little more than a ring visible only from the air. This one appears as a circular-shaped depression roughly twelve metres in diameter, enclosed by a bank running from northwest to south, with a scarp, an abrupt change in ground level, making up the boundary elsewhere. Its presence was further confirmed by a Google Earth orthoimage dated 18 November 2018, and the site sits approximately 115 metres southwest of the townland boundary with Knockderk. A related earthwork, recorded separately as LI033-150, lies around sixty metres to the east. The record was compiled by Martin Fitzpatrick and uploaded in April 2021.

Because the monument survives as a subsurface feature in working farmland, there is nothing to see at ground level in any conventional sense. The depression and bank are subtle enough that a visitor standing in the field might notice an irregularity underfoot without immediately reading it as ancient. The cropmark signature, which shows most clearly in dry summers when differential moisture in the soil affects plant growth, is best appreciated through the aerial imagery available via Google Earth or the OSi orthophoto layers, both of which reveal the circular outline with some clarity. The site is on private agricultural land, so any visit would require the landowner's permission, and the surrounding pasture offers no formal access or interpretation.