Not a tower, not a tomb, not a carved stone, but a boundary, the kind of low earthen or stone division that farmers across Ireland have been building, rebuilding, and ignoring for centuries. At Tuar Sáilín in County Kerry, one such feature sits in the landscape downslope from a neighbouring recorded site, close to a small tributary of the Owroe river, unassuming enough that most people would walk past it without a second thought.

What gives it weight is its context. The Iveragh Peninsula, the great arm of land that reaches into the Atlantic and cradles the Ring of Kerry, has been systematically documented by archaeologists, and the survey compiled by A. O'Sullivan and J. Sheehan for Cork University Press in 1996 drew attention to concentrations of old field boundaries in the immediate vicinity of this site. Old field systems, sometimes called relict or fossilised field boundaries, are divisions of the land that fell out of use long ago but were never entirely erased. They can reflect the organisation of farming from the early medieval period or even earlier, preserved beneath later vegetation or simply overlooked because they do not announce themselves the way a ringfort or a standing stone does. Grouped together, as they appear to be here along the Owroe tributary, they suggest a landscape that was once carefully divided and managed, then gradually left to its own devices.