That absence is quietly telling. When the scholar R.A.S. Macalister surveyed and documented the graveyard's stones in 1916 and 1917, producing a careful numbered plan, this particular slab went unrecorded. Whether it was obscured, overlooked, or simply not considered significant enough to include is no longer possible to say.

The slab sits in the eastern half of what is known as the Saint's graveyard, a burial enclosure on this early medieval monastic island whose history stretches back to the sixth century. The stone itself is modest in scale, measuring roughly 69 centimetres long and 49 centimetres wide, with an irregular shape and a surface that is uneven and roughly finished. It lies immediately to the west of Macalister's numbered stone 64, positioned about 11.65 metres from the graveyard's northern wall and 3.1 metres from the eastern wall. Those measurements are precise enough to locate it clearly on the ground, even if it never made it onto the historic plan. Graveslabs of this kind, simple unworked or lightly worked stones marking burial places, are common across early Irish ecclesiastical sites, but the gap between what Macalister recorded and what actually exists on Inis Cealtra serves as a small reminder that even well-documented places hold things that fall between the lines of the archive.