It commemorates Theobald Butler of Darreloskan and a woman named Catherine, the rest of whose identity has been swallowed by an unfinished or damaged inscription. The slab is substantial, standing 1.6 metres above ground with a width of 1.15 metres, though its lower portion is either buried or lost. What survives is carved with considerable care: a seven-armed segmental-headed cross whose terminals end in fleur-de-lis, with foliate motifs, trefoils among them, filling the four sunken segments of the cross-head. Below the cross-head sits a four-barred knop, a decorative boss-like feature common in medieval funerary carving. Running around the margin is a Latin inscription in Black Letter script, the dense Gothic lettering typical of late medieval monumental work, which reads in part HIC JACET THEOBALDUS BUTLER DE DARRELUSKAN GENEROSUS ET, and then trails off.

The heraldry carved to the left of the cross-shaft is where the stone becomes particularly dense with meaning. The shield carries six quarters of arms, a display that announces family alliances as much as individual identity. The Butler of Dunboyne arms appear in the first and fifth quarters, gold with a blue indented chief and three escallops; the Butler arms proper, three golden covered cups on red, fill the second and sixth; and the Petyt arms, a black fess on silver, occupy the third and fourth. On the opposite side of the shaft there is a second, heavily worn achievement of arms with a curvaceous shield, what appear to be lion-like supporters, and a helmet, though the weathering has made precise identification difficult. The inscription was transcribed by Maher in 1997 and translated by Knowles as early as 1903, suggesting the stone has drawn scholarly attention for well over a century, even if it remains largely unknown outside specialist circles.