A small terrace on the south-western face of a hill in County Westmeath, open grassland, decent views to the south-east; nothing that would make a passing walker pause. And yet something was here, circular and enclosed, old enough to have earned the simple annotation "fort" on the Ordnance Survey's 1837 Fair Plan map. That word, used by early nineteenth-century cartographers to denote a ringfort, points to an earthwork of early medieval origin. Ringforts, typically circular enclosures defined by one or more earthen banks and ditches, were the most common form of rural settlement in Ireland between roughly the fifth and twelfth centuries, used as farmsteads by families of varying status. Whatever stood at Galmoylestown has since been levelled entirely, leaving no surface trace.

The 1837 six-inch Ordnance Survey map adds one further detail: a gravel pit shown inside the enclosure on its southern side. Whether that pit contributed to the destruction of the monument, or simply occupied space within a structure already deteriorating, is not recorded. By the time aerial photography could offer a different kind of witness, only the faintest crop mark remained. A Digital Globe image taken in November 2011 catches it, barely; the differential growth of vegetation above buried features, revealing in outline what the ground itself no longer shows in relief. It is the kind of evidence that requires you to know what you are looking for before you can see it at all.