That word, spare and administrative, covers an enormous range of possibilities in the Irish archaeological record. An enclosure might be a ringfort, the circular earthen homestead of an early medieval farming family; it might be a cashel, the same idea realised in dry stone; it might be a ceremonial enclosure of far greater antiquity, or the remains of a monastic boundary, or a later field system whose origins have blurred with time. The classification alone tells us the site exists and that it has been deemed significant enough to record. Beyond that, at this point, the specifics remain quiet.

Tully is a townland name derived from the Irish tulach, meaning a small hill or mound, a word that recurs constantly across the Irish landscape and often signals that a place carried some local importance, whether practical or ceremonial, long before anyone wrote it down. Mayo itself is one of the more archaeologically layered counties in the west of Ireland, with evidence of human activity stretching back to the Neolithic period. Enclosures in this part of Connacht range from the elaborately ditched to the barely visible, and without further detail it is not possible to say where this particular example sits on that spectrum.