A fragment broken from one of the front slabs, bearing the partial inscription TERO and the tail end of a date, was at some point incorporated into the plinth of a nearby Butler tomb. What remains of the original composition still tells a coherent story, just not quite a complete one.

The tomb was made in 1608, the date confirmed partly by style and partly by the surviving figures of two digits on a broken fragment, since the corresponding '16' of the full date is missing from the main slab. An altar tomb of this type typically consists of a flat stone table top, the mensa, raised on carved front panels, and this one is no exception. Two flat limestone slabs together form the mensa, carved as a single composition showing a cross with expanded terminals, a sun and moon flanking it on either side, and a large IHS monogram below the cross-head. Kneeling to either side of the cross-shaft are Richard Cantwell of Ballenfeen, shown with long hair and a beard, and his wife Grace, depicted in a long fur-trimmed cloak, ruffed collar, and hat, holding a rosary. The Latin inscription, rendered in black letter script and running along and across the upper edges of both slabs, was transcribed by Carrigan in 1903 and translates as: 'Here lie Richard Cantwell of Ballenfeen, Esq., who died [date left uncut] and Graes, his wife.' The maker signed his work in roman capitals directly on the mensa: Walter O'Kerin, a detail that makes this tomb unusually attributable at a time when craftsmen rarely left their names on funerary stonework. The date of Richard Cantwell's death was apparently never carved, leaving that space on the stone as blank as it was when the slab was first laid.