It carries no carving, no inscription, no name. It measures just over a metre in length and less than half a metre across, and it marks a grave that has never been publicly identified.

What makes the slab quietly notable is its relationship to the historical record. When the scholar R. A. S. Macalister surveyed the graveyard and produced his detailed plan in 1916 and 1917, he drew this slab in its position, placing it accurately relative to the surrounding enclosure walls. Yet he assigned it no number in his catalogue, leaving it documented but unnamed, present on the page but outside the sequence of recorded monuments. A recumbent graveslab is simply a flat stone laid horizontally over a burial, a common enough form in early Irish ecclesiastical sites, but the absence of any decoration here makes attribution or dating difficult. Inis Cealtra itself was a significant early Christian monastic site, associated with Saint Caimin and with continuous use from at least the seventh century, which means the graveyard in which this slab sits has accumulated layers of burial across many centuries.