The mound measures just three and a half metres by two and a half, and rises only ten centimetres above the surrounding earth, the kind of feature that most walkers would cross without a second glance. Locally, it is called the Bishop's Grave.

An ecclesiastical enclosure, in Irish archaeological terms, is the boundary that once defined the sacred or functional territory of an early church site, often a curving bank or ditch that separated the religious precinct from the secular landscape beyond. That this mound sits within the western sector of such an enclosure at Tonygarrow is significant: the west was traditionally associated with burial in early Irish ecclesiastical practice, and distinguished or foundational figures were sometimes interred in prominent positions within the enclosure itself. Whether the local name preserves a genuine memory of a bishop or cleric buried here, or whether it is a later piece of folk attribution attached to an older and unrelated mound, the notes do not say. What remains is a very small earthwork carrying a very large title, quietly occupying its corner of a site whose wider ecclesiastical history has yet to be fully told.