That it exists at all is largely a matter of inference: the scholar R.A.S. Macalister, cataloguing Ireland's ogham stones in 1945, described it as "the extreme top of a stone", suggesting he could see only the barest portion. When researchers visited the site in 2015, neither the stone nor its inscription could be identified with any certainty. The partial reading he did manage, transcribed as . . . UMALL. ., trails off in both directions into silence.

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 lines cut along the edge of a stone. Kilcoolaght burial ground, known in Irish as Cill Chuallachta, holds not just this fragment but somewhere between seven and eight ogham stones in total, gathered within iron railings erected in the 1940s. The concentration is notable. The antiquarian Richard Rolt Brash also recorded a local tradition that a church once stood on a rectangular patch of untilled ground a short distance from the cilleen, the term for a small, often informal burial enclosure associated with unbaptised children or marginal burials. No physical trace of that church survives. The fragment now studied as number 208 in Macalister's corpus has since been included in the Ogham in 3D project, run by the School of Celtic Studies at the Dublin Institute for Advanced Studies, which uses digital scanning to document stones that are damaged, eroded, or otherwise difficult to read in person.

The stone sits in the south-east quadrant of the enclosure. Given that even trained surveyors could not locate it on a recent visit, anyone hoping to find it should expect the search itself to be part of the experience.