It does not appear as a ridge in the grass, a shadow from low winter light, or a line of different vegetation. It is simply gone from view, yet it is there, sealed half a metre down under peat, and it was dividing land long before that peat began to form.

The wall came to light not because anyone was looking for it, but because something else was being uncovered. In September 1989, the excavation of a short cist, a small stone-lined burial box of prehistoric origin, on the north side of Prospect Hill in Shanid Barony led archaeologists to notice, in the area to the east, a series of pre-bog field boundaries emerging during land reclamation work. Several stretches were recorded, but this one, running northwest to southeast for roughly 140 metres, was the best preserved of them. A short section was excavated and found to be a collapsed wall with an overall spread of around four metres, its surviving core measuring 1.3 metres wide and up to half a metre in height. It had been built directly on what the excavators described as an old ground surface, the land as it existed before the bog grew over it, with one notable refinement: a shallow trench had been cut through that surface beneath the wall, possibly to serve as a foundation or simply to mark out the intended line before construction began. The detail is small but oddly vivid, suggesting a builder pausing to score the ground before committing to the work. The findings were reported by Doody in 1992 and 1993.

There is nothing to see at the site today. The field has been returned to pasture through reclamation, and no surface trace of the boundary survives. What makes it worth knowing about is precisely that absence: the wall exists only in the excavation record, a buried remnant of a farmed landscape that predates the bog which swallowed it. For anyone interested in the archaeology of the area, the related features recorded nearby under the same survey, including the cist burial and additional pre-bog walls, fill out a picture of early activity on this hillside that the present-day surface gives no hint of whatsoever.