No carved cross, no knotwork, no inscription. Just a plain tapered limestone slab, its lower portion lost beneath the ground, lying flat in the nave just north of the south transept. It measures 1.28 metres in length, narrowing from 0.71 metres at the top to 0.58 metres at the middle, with only 0.07 metres of depth visible above ground level. The edges are chamfered, meaning they are cut away at a slight angle rather than left square, a modest finishing touch that is the only sign of deliberate craft on an otherwise unadorned surface.

Maher, writing in 1987, noted the slab's presence and dimensions, though the identity of whoever lies beneath it remains unknown. Medieval graveslabs of this type were commonly laid over the burials of clergy or patrons of a religious house, and the Dominican friaries of Ireland produced many such markers during the later medieval period. The plain character of this example sets it apart from the more elaborately decorated slabs found elsewhere, where effigies, heraldic shields, or foliate crosses would signal the status of the deceased. Here, there is nothing of that kind. Whether that reflects the rank of the buried individual, the customs of this particular community, or simply the loss of surface detail over centuries, the slab does not say.