In a pasture near Longstown in County Cork, a north-south roadway curves slightly out of its natural line, apparently to respect a site that no longer exists above ground. Underfoot, slight undulations in the field are the only remaining hint of what once stood here: one of at least three enclosures, or lisses, earthwork ringforts typically formed by one or more banks and ditches enclosing a domestic area, that have since been levelled entirely into the landscape.

Writing in 1918, the local historian Power noted that the Ordnance Map had recorded two lisses in the area, and that both had unfortunately disappeared, along with a third that the map had not even thought to include. That third enclosure went unrecorded and unprotected, erased before anyone thought to measure or describe it. The site at Longstown, on a south-east-facing slope, belongs to a pattern familiar across Cork and much of rural Ireland, where centuries of agricultural improvement quietly removed earthworks that had survived from the early medieval period. The liss, as a form, was usually a farmstead enclosed for security or status, and examples were once extraordinarily common across the Irish countryside. What makes the Longstown site quietly remarkable is not what remains but the layered fact of its disappearance: noted as gone in 1918, recorded again as gone in 1994, and marked today only by a kink in a road that has simply never been straightened.