That deviation is not accidental. It follows the ghost of a circular enclosure that has otherwise largely vanished into the ground, its original form now reduced to a low undulation in the grass on a north-facing slope.

The enclosure was recorded as a circle of roughly eighteen metres in diameter on the Ordnance Survey six-inch map of 1842, one of the earliest systematic cartographic surveys of the Irish countryside. By the time that map was made, the feature may already have been in decline, and it has since been levelled to the point where the earthwork is barely perceptible underfoot. Circular enclosures of this kind are common across Ireland and are often associated with early medieval settlement, the ring-shaped banks and ditches that once defined a farmstead or small defended homestead. Without excavation it is impossible to say precisely what this one was or when it was built, but the fact that the modern field boundary respects its outline suggests the enclosure was still legible enough, at some point in the agricultural past, for farmers to work around it rather than through it.

What survives now is less a monument than a trace, a slight swelling in an otherwise ordinary meadow, most likely to be noticed in low winter light when raking shadows pick out the faintest changes in ground level.