It commemorates a husband and wife separated in death by eight years, and was commissioned not by either of them, but by their sons, who had it made in 1592. The slab itself is a substantial piece of work, 2.18 metres long and 0.82 metres wide, with an undercut chamfered edge, and its decoration, though slightly worn, remains legible enough to reward close attention.

The inscription, transcribed and translated by a scholar named Heweton in the early twentieth century, reads: here lies Terence O'Donill, who died on 4 March 1583, and his wife, identified variously in different transcriptions as Elena White or Helena Huett, who died on 24 April 1591. Their sons, unnamed on the stone, caused the tomb to be made in 1592, closing the Latin text with a petition to the Almighty to look favourably on them all. The carved decoration is built around a ringed cross, a form common in Irish funerary stonework, where a circle intersects the arms of the cross. Here the cross has bifid terminals, meaning the ends split into two lobes, and four additional diagonal arms radiate from the angles of the cross-head, each with expanded terminals of their own. The cross-shaft below is fluted and tapers slightly, sitting on an elaborate pillar-base. On either side of the shaft, heraldic shields were carved, though no charges, the symbols that would identify a family's coat of arms, appear on them, either because they were never added or because wear has erased them entirely. The discrepancy in the wife's name, White in one source and Huett in another, remains unresolved, a small puzzle baked into the monument's history.