On a low hillock amid the rolling pastureland of Russelstown in north County Galway, an ancient circular enclosure once occupied the high ground, the kind of modest elevation that prehistoric and early medieval communities consistently favoured for settlement, storage, or ceremony. The enclosure measured roughly thirty metres in diameter, a scale consistent with the ring forts, or raths, that appear in their thousands across Ireland, earthwork enclosures typically built during the early medieval period to define a farmstead and its immediate surroundings. Today, no surface trace survives.

What is known comes from cartographic evidence rather than from the ground itself. The third edition of the Ordnance Survey six-inch map, published in 1932, recorded the enclosure clearly enough to be noted, though even at that point field banks had already cut across it at the south-west and north-west, indicating that agricultural reorganisation had been encroaching on whatever earthwork remained. At some point between that mapping and the present, the last visible traces were lost entirely, absorbed into the working field system around it. The hillock is still there, the land still undulates as it always has, but the enclosure exists now only as a cartographic ghost, a circle drawn on a map that no longer corresponds to anything a visitor could identify underfoot.