The peat that once covered it has been stripped back over the years, and what has appeared is a curved field boundary running for roughly 160 metres in a south-westerly direction, from the edge of a cliff down to what appears to have been an enclosure. It is low and modest, around 0.6 metres thick and only 0.3 metres high where it survives, but the line it traces is deliberate and purposeful, a boundary someone once built to divide the land in a way that made sense to them.

What makes this wall particularly interesting is that it rests directly on the mineral soil beneath the bog, which tells us something important about its age. Blanket bog in Ireland began accumulating over former agricultural and pastoral landscapes several thousand years ago, in many cases burying field systems, walls, and settlements that had been in use during the Bronze Age or earlier. A wall sealed beneath peat and only now being uncovered by turf-cutting is, in the most literal sense, a relict, a remnant of a landscape that was in use before the bog grew over it. Dursey Island, now accessible only by cable car, is a remote enough place today, but this buried boundary is a reminder that its slopes were once actively managed farmland, divided and enclosed by people who understood the terrain well enough to run a wall from a clifftop to an enclosure below.