The angle of the enclosure at that corner was deliberately left open, a small architectural irregularity that turns out to have a specific explanation rooted in older religious practice.

In 1744, the traveller and antiquary Isaac Butler recorded a holy well dedicated to a Saint Kiarnan at that south-western point, lying just beyond the graveyard boundary. Holy wells in Ireland were typically sites of pre-Christian or early Christian veneration, often associated with a local saint and used for patterns, healing rituals, or seasonal gatherings. The placement of this one outside the wall, rather than within the enclosure, appears to be why that corner of the graveyard was never fully closed off; the well seems to have held enough significance that the boundary accommodated it. No physical trace of the well survives today, and the saint to whom it was dedicated, Kiarnan, is otherwise obscure. What remains is only the documentary record Butler left behind and the suggestive gap in the wall that, once you know what it signifies, reads as a kind of negative evidence.