Somewhere beneath the low-lying farmland of east Galway, the footprint of an early medieval cashel, a type of ringfort enclosed by a stone wall rather than an earthen bank, has been entirely absorbed into the working landscape. No raised ground, no scatter of stone, no crop-mark visible to a passing eye; just ordinary fields where an ordinary farm now stands.

The 1838 edition of the Ordnance Survey six-inch map records the site clearly enough: an oval enclosure measuring roughly 42 metres on its north-west to south-east axis and about 35 metres across, with a house and a small associated field already occupying the interior by the time the surveyors reached it. That detail matters. It tells us the enclosure was not just surviving in 1838 but was actively in use, its ancient boundary repurposed to define a domestic holding. What happened afterwards was more gradual and more thorough. Extensive field clearance in the area removed whatever structural fabric remained, and the site crossed from the category of "altered" into the category of "gone".

Ringforts are among the most common monument types in the Irish countryside, with tens of thousands once scattered across the island, but a significant proportion have been lost precisely this way, not through dramatic destruction but through the slow accumulation of agricultural improvement. Drumminacloghaun is a reminder that the map can preserve what the ground no longer can.