The wall stretches some sixteen metres and was built from granite and schist boulders laid directly on mineral soil, though at its south-western end it appears to trail out onto what was already forming as peat when someone last tended it. It is the kind of thing that only becomes visible when commercial or domestic turf-cutting slices down far enough to catch the edge of it.

What makes this field boundary quietly remarkable is what its burial implies. Peat accumulates slowly, and a wall covered by up to 1.2 metres of it was already obsolete, or at least abandoned, before the bog closed over it. A pre-bog earthen bank noted nearby adds to the picture: this was once a managed, divided landscape, with people drawing lines across the ground to mark out territory or contain livestock. The glacial ridge to the north would have provided drier, better-drained ground, and the low-lying area to the south, now boggy, may have been workable farmland or rough grazing at some earlier period. Bogs in the west of Ireland have been encroaching on former agricultural ground since the Bronze Age in some areas, gradually swallowing walls, banks, and field systems that predate written record entirely.