That modest detail, the absence from the record, is part of what makes this feature at Knocktoosh so quietly arresting. It exists, technically speaking, outside official archaeological cartography, and yet satellite imagery suggests something deliberate and ancient lying just beneath the surface of an ordinary working farm.

The site was identified in 2016, not by an archaeologist on a dedicated survey but by a Teagasc farm inspector, whose role would ordinarily concern soil, drainage, and land productivity rather than prehistory. What they noted was a circular area roughly ten metres in diameter, defined by a fosse, which is essentially a ditch cut around a central mound, a form characteristic of a barrow type associated with burial. The surrounding landscape had previously been blanket bog, that dense, waterlogged peat cover which so often preserves what lies beneath it, before being drained and converted to pasture at some point in the agricultural past. A post-1700 field boundary running northwest to southeast has since cut across the southwestern edge of the monument, truncating it. The site's existence was confirmed through analysis of Digital Globe orthoimagery taken between 2011 and 2013, as well as Google Earth images, where the circular form remains legible from above even if it is largely invisible at ground level. The record was compiled by Fiona Rooney and uploaded in November 2021.

Because the site sits within reclaimed agricultural land and is not marked on Ordnance Survey Ireland historic mapping, there are no waymarkers or interpretive signs to guide a visitor. The circular feature is most legible from aerial imagery rather than on foot, where the low relief of the fosse can easily be mistaken for a natural hollow or a drainage feature. Anyone visiting the area should be aware that this is private farmland, and appropriate permissions would need to be sought before approaching. The most honest encounter with this site may simply be through the satellite images themselves, where the faint ring of a possible ancient burial ground is just visible, pressed into the green of a Limerick field.