The cartographic record charts its gradual disappearance from certainty: the 1837 Ordnance Survey six-inch map marks a small circular feature at the centre of the enclosure, labelled simply 'Cave'. By the 1919 edition, that confidence had already slipped, and the feature is listed as 'Cave (Site of)', the quiet parenthetical of a place that has been half-forgotten. A souterrain, for those unfamiliar with the term, is an underground stone-lined passage or chamber, typically associated with early medieval ringforts and raths, and used variously for storage, refuge, or both. What was once considered worth naming on a national map is now, at ground level, essentially invisible.

The rath itself, a roughly circular earthen enclosure of the kind built across Ireland during the early medieval period, remains the broader context here. Within its interior, the ground at the centre sits noticeably higher than the surrounding area, which is precisely the kind of subtle topographical irregularity that can indicate a collapsed or infilled underground structure beneath. No entrance, no stonework, and no depression mark the spot. The progression from 'Cave' to 'Cave (Site of)' to no visible trace at all is a small but telling record of how a feature can move from the acknowledged to the uncertain to the apparently gone, without anyone necessarily deciding that it has vanished.