On an east-facing slope in boggy pasture, something once stood, or was enclosed, or was otherwise marked off from the land around it. Today there is nothing to see. The ground has been levelled, and the surface offers no trace of what was there.

What makes this particular absence interesting is the gap between two Ordnance Survey maps. The 1837 edition of the six-inch OS map, that meticulous Victorian project that swept across the Irish landscape recording field boundaries, ruins, and earthworks with considerable care, shows nothing at this location. By the time the 1912 edition was produced, something had been captured: roughly half of what appears to have been a circular or oval-shaped enclosure. Enclosures of this general type in Ireland range widely in origin and purpose, from early medieval ringforts used as farmsteads or places of local assembly, to earlier prehistoric boundaries whose meanings are now largely out of reach. Whether the feature at Castlegal belonged to any of these categories is not recorded. What the cartographic sequence does suggest is that by 1912 enough remained to be worth mapping, and that at some point after that it was levelled entirely, leaving the 1912 survey as the closest thing to documentation the site now has.