No earthwork rises from the grass, no bank or ditch catches the afternoon light, no ring of stones betrays what once stood here. The monument has vanished entirely at ground level, leaving nothing for the eye to settle on across the well-drained pasture of a low, gentle rise.

What survives is cartographic rather than physical. The 1837 edition of the Ordnance Survey six-inch map, the great early nineteenth-century project that systematically documented the Irish landscape at a scale that had never been attempted before, recorded this spot as a circular enclosure and labelled it plainly as a fort. That designation almost certainly refers to a ringfort, the most common type of early medieval enclosed settlement in Ireland, typically formed by one or more earthen banks and ditches surrounding a homestead. Thousands of these were built across the country between roughly the fifth and twelfth centuries, and thousands have since been lost to agriculture, drainage, and the slow pressure of the land itself. Lislea appears to be among them. By the time anyone thought to look again, the surface evidence was gone.