In the townland of Ballyegny in County Limerick, there is a scheduled monument that no longer exists above ground, a circular earthen mound, roughly fifteen metres in diameter, that has been so thoroughly levelled that when the site was formally inspected, not a trace of it remained. It appears on the 1923 Ordnance Survey six-inch map as a clear, discrete feature, yet somewhere between that survey and the present day, it simply ceased to be visible.

The original mound sat at the base of a south-facing slope, on the northern side of a stream, the kind of sheltered, well-drained position that was favoured across many centuries and many different kinds of use. Circular earthen mounds of this type can represent a range of things, from prehistoric burial monuments to later medieval features associated with territorial or ceremonial purposes, though without excavation it is rarely possible to say which. What the 1923 map confirms is that the feature was still recognisable as a monument at that point, with its roughly circular outline legible enough to be recorded at a meaningful scale. The record was compiled by Denis Power and uploaded in August 2011, by which point the monument had already been lost.

For anyone curious enough to visit Ballyegny, the landscape itself is the thing to observe. The pasture, the slope, the stream running nearby, these are the coordinates that once framed whatever the mound was. There is nothing to look for on the ground, which is, in its own way, the point. The site sits in the national record as a kind of placeholder, a reminder that the archaeological map of Ireland includes not only what survives but what has been lost to agriculture, drainage, and time. The absence of the mound does not make the entry meaningless; it makes it a small, precise document of erasure.