The cross-slab, measuring just 0.38 metres by 0.22 metres, is no longer visible at the site, which gives it a particular kind of melancholy. It has not been destroyed, exactly; it has simply disappeared from view, leaving behind only the documentary record of what it once said.

The stone carried an incised Latin cross, a simple single-line design with slightly enlarged ends, roughly 0.12 metres long, and beneath it an inscription in Old Irish: 'Ór ar Thuathal', meaning 'A prayer for Tuathal'. Cross-slabs of this kind are among the earliest forms of Christian memorial in Ireland, modest flat stones marked with a cross and sometimes a short dedicatory phrase, intended to invite prayers from passers-by for the soul of the named individual. Tuathal is an Old Irish personal name, and nothing further is recorded about who he was. Writing in 1905, the historian William Carrigan described the stone as a very small freestone flag, thin and rough, which suggests it was never a grand monument but rather the sort of unassuming marker that might easily be moved, buried, or simply forgotten over the centuries. Crawford noted it in 1913 and Manning returned to it in 1982, by which point its precise whereabouts within the graveyard were already uncertain.