A souterrain, which is an underground stone-lined passage or chamber typically associated with early medieval settlements and used for storage or refuge, is said to exist within the interior of a cashel, a type of dry-stone ringfort common across the west of Ireland. The catch is that when the site was formally inspected, no visible surface trace of the souterrain survived. Its presence rests entirely on the word of a landowner.

That conversation was recorded by McCaffrey in 1952, noted at page 157 of what appears to have been a systematic survey of the area. The landowner's claim was taken seriously enough to log, but not confirmed by anything the ground itself was willing to reveal. This is not entirely unusual in Irish archaeology. Souterrains frequently collapse inward over centuries, leaving the land above them deceptively flat and unremarkable. The cashel that encloses the supposed souterrain is itself a separate recorded monument, and the site is further complicated by the association of a possible burial nearby. What that burial consists of, whether a marked grave, exposed bone, or simply local tradition, the record does not say.

What remains, then, is a site defined almost entirely by absence and hearsay, a cashel enclosing something that may or may not be there, with a possible burial somewhere in the vicinity, and a single conversation from 1952 as the thread connecting the whole thing to the historical record.