In flat pastureland at Bullaunagh in County Galway, there is a place that exists almost entirely on paper, documented twice by mapmakers decades apart, and now leaving no trace at all on the ground.

When the Ordnance Survey produced its six-inch map series in 1838, surveyors recorded a subcircular enclosure here, measuring roughly 36 metres east to west and 26 metres north to south. Enclosures of this kind, often the remains of early medieval farmsteads or settlement boundaries, were once a common feature of the Irish landscape, typically built from earthen banks or stone walls. By the time the 1921 edition of the same map was produced, something had already shifted: the feature was represented not as a defined enclosure but as a circular depression, reduced in apparent diameter to around 28 metres. Whatever structure or earthwork had existed was already in the process of being swallowed. Today, no visible surface trace survives. Approximately 80 metres to the north-west, a cashel, which is a stone-walled enclosure typically associated with early medieval settlement, does still survive, and its presence suggests this part of Bullaunagh was once a more populated and organised landscape than the quiet pasture now implies.

What makes the Bullaunagh enclosure quietly interesting is precisely this quality of measured erasure. The two map editions function almost like a time-lapse, catching a feature mid-dissolution. The ground holds no visible memory of it now, but the cartographic record preserves the outline of something that once mattered enough to build.