The exact reasons for sealing it off are unrecorded, but the act itself is telling. Souterrains, which are dry-stone lined underground chambers or tunnels typically associated with early medieval settlements, were built for storage, refuge, or both. That someone once took the trouble to hide this one suggests it was considered worth protecting, or perhaps worth forgetting.

The structure sits within a cashel, a term for a stone-walled enclosure of early medieval date, the drystone equivalent of a ringfort. Local tradition holds that the souterrain entrance lay somewhere on the northern slope of the cashel, though it has since been blocked up and its precise location lost to memory. No excavation appears to have established whether the passage survives intact beneath the surface, or what condition it might be in. What remains is the tradition itself, the suggestion of something underground and the knowledge that someone, at some unknown point, chose to close it off rather than leave it open.