At Ballybeg in County Westmeath, an earthwork once sat on a low gravel ridge commanding clear views to the east, west, and south. Today, no surface trace of it remains. What survives instead is the outline of an absence, a place that exists in the record precisely because it no longer exists on the ground.

The earthworks at Ballybeg were documented through aerial photography carried out by the Geological Survey of Ireland, which captured features on the landscape that are invisible to anyone simply walking the land. At some point during land reclamation works in the late 1970s, those features appear to have been levelled. The gravel ridge itself is still there, a modest but useful piece of topography that would have made the original earthwork a sensible place to build, offering natural drainage and a broad field of view. Whatever the structure was, a field boundary, a ringwork, or something older, the episode is a familiar one in the Irish midlands, where agricultural improvement schemes of the late twentieth century reshaped the land in ways that removed traces accumulated over centuries.