This souterrain, an underground passage typical of early medieval Ireland, was once well known to locals but has since vanished from precise record. The structure sits somewhere amongst the rocky outcrops that punctuate the farmland, its exact entrance now lost to time and perhaps deliberately concealed or accidentally filled in during centuries of agricultural work.

Souterrains like this one were common throughout Ireland between the 6th and 12th centuries, serving as storage spaces, refuges, or possibly holding ritual significance for the communities that built them. These subterranean passages were typically constructed by digging trenches, lining them with stone walls, adding capstones for roofing, then covering the entire structure with earth. The Glebe souterrain would have been part of this broader tradition of underground architecture that dotted the Irish landscape, particularly in areas of ringforts and early Christian settlements.

The frustrating vagueness of its location speaks to a broader challenge in Irish archaeology; many sites recorded in earlier surveys have become increasingly difficult to locate as farming practices modernised and local knowledge faded. The Archaeological Survey of County Donegal, compiled in 1983, captured what information remained about this elusive structure, preserving at least the memory of its existence even if the souterrain itself remains stubbornly hidden beneath Donegal’s soil.