At the ruined medieval parish church of Seskinan in Knockboy, County Waterford, seven ogham stones have ended up in the same small ruin, though they got there by very different routes. Six of them were repurposed as lintels during the construction of the church itself, their ancient inscriptions pressed into service as building material. The seventh, a slim slate slab measuring just over a metre in length, stands upright in the north-west corner of the ruin. When the scholar R. A. S. Macalister first encountered it in 1907, it was buried almost to its head, marking what he described as a modern grave. Someone, at some point after the stone's original early medieval use, had quietly pressed this piece of inscribed prehistory into service as a headstone.

Ogham is an early medieval script used primarily in Ireland between roughly the fourth and seventh centuries, in which letters are represented by groups of notches and strokes cut along the edge or angle of a stone. This particular stone has inscriptions running along all four of its angles, a relatively unusual feature, and the partially legible text was read by Macalister in 1945 as VEDABAR M[A]Q[--]LSM MOCOI ODR[--]REA. The formula follows a common ogham pattern, recording a personal name, a patronymic using MAQI meaning "son of", and a tribal affiliation introduced by MOCOI. Damage to the top of the stone and along one angle has left portions of the inscription uncertain. There is also a small plain cross incised into the lower face, between the third and fourth inscribed angles, suggesting a later Christian appropriation of a pre-Christian monument, the kind of quiet layering of meaning that recurs across early Irish sites. The stone has since been documented as part of the Ogham in 3D project run by the School of Celtic Studies at the Dublin Institute for Advanced Studies, which produces high-resolution digital scans of surviving ogham monuments across Ireland and Britain.