At Bohergar in County Limerick, the official record notes a circular enclosure roughly thirty metres in diameter, mapped and measured, assigned a monument number, and then, when someone actually went to look at it, simply not there. The field had swallowed it.

The enclosure appeared on the 1923 Ordnance Survey six-inch map, which places its documentation within living memory of people still alive today. Circular enclosures of this general type, often referred to as ringforts, were once among the most common man-made features in the Irish landscape, built and occupied broadly between the early medieval period and the twelfth century, and used as enclosed farmsteads or defended homesteads. Estimates suggest there were once tens of thousands of them across the island, though agricultural improvement, land drainage, and clearance have removed a significant proportion. When Denis Power compiled the record uploaded in June 2013, the site inspection confirmed that the monument had been levelled and was no longer visible on the ground. The south-facing slope in gently undulating pasture where it once sat still offers good views in all directions, which is exactly the kind of position an early medieval farmer would have chosen deliberately.

For anyone who makes the trip to this part of Limerick, the honest advice is to manage expectations carefully. There is no earthwork to trace, no bank to walk around, no visible feature to photograph. What remains is the landscape context: a slope with aspect and outlook that would have made practical sense to whoever built here, now returned entirely to pasture. The 1923 OS six-inch mapping is available through the Historic Environment Viewer and the Irish Historic Maps portal, which allows a visitor to at least orient themselves to where the enclosure was recorded. The exercise is a useful reminder that the archaeological map of Ireland is partly a map of things that no longer exist, preserved only in archival notation and the faint possibility that something remains below the plough line.