What appears to be a routine rural burial site, extended and reshaped over the centuries into a large sub-rectangular enclosure, preserves within it the ghost of something far older: a shallow curving bank and ditch running along the western side, the remnant arc of a much earlier, smaller, circular burial ground. That curve is not incidental. In early Christian Ireland, a circular enclosure of this kind, known as a cashel or rath-type enclosure depending on its construction, was the characteristic boundary of a monastery, a physical and spiritual boundary separating sacred ground from the wider landscape.

The place-name gives a clue to the terrain. Grallagh derives from An Ghreallach, meaning "miry place", and the land immediately to the south is indeed poorly drained, while the higher, better-drained ground lies to the north and east. The cluster of features here, a ruined church, the graveyard, a holy well, and a holy stone, may collectively represent the remains of an early Christian monastery founded by St Maccallin, also recorded as Maccullin. A report compiled by H. A. Wheeler in April 1975 and held on the Sites and Monuments Record file noted that the original circular burial ground, enclosed by a bank and external fosse (a fosse being a defensive or boundary ditch), was later extended northward to form the present, larger enclosure. The curving southern boundary of the ditch, which also marks the boundary with the neighbouring Cottrelstown townland, is considered the most likely candidate for the outer edge of that early monastic enclosure. St John's Well lies approximately sixty metres to the south, adding another layer to what was evidently a significant focal point in the early medieval religious landscape of the area.

The site sits on undulating pasture, and the earthwork traces are subtle rather than dramatic. The curving bank and ditch to the west of the graveyard are shallow and easy to miss if you are not specifically looking for them. Walking the western perimeter of the burial ground and looking inward gives the clearest sense of the original circular form. The southern boundary, where the graveyard meets Cottrelstown townland, is where the ditch curve is most readable as an enclosing feature. The holy well to the south is a separate monument worth locating, as holy wells, often associated with early monastic saints, were typically maintained as places of local veneration long after the formal religious life of a site had ended.