It is the middle of three stones arranged as a group, a configuration described as anomalous, which is to say it does not fit neatly into the patterns that typically explain why such stones were placed together. Ogham is an early medieval script, most commonly found in Ireland and parts of Wales and Scotland, in which letters are represented by a series of notches and strokes cut along the edge of a stone, usually to record a personal name and lineage. Here, that inscription runs along the southeast edge, beginning about forty centimetres above the ground and climbing to roughly one and a half metres up the stone's face.

The inscription was read by R. A. S. Macalister, the prolific cataloguer of Irish ogham stones, in his 1945 corpus, and he rendered it as MONGUNILOCID MAQI ALOTTO, noting that the 'ng' functions as a single letter within the ogham system. The formula MAQI, meaning 'son of', is a standard feature of ogham commemorative inscriptions, so the stone likely records that a man named Mongunilocid was the son of a man named Alotto. Parts of the inscription are now heavily eroded, so Macalister's reading, made decades ago, may reflect more legible conditions than exist today. The stone itself is roughly rectangular in plan and oriented east to west along the ridge on which it sits, with a lower section of more regular shape giving way to an irregularly tapering top.