At Ballagh, a small oval hut site has emerged from the peat, its collapsed drystone walls still tracing a footprint of roughly four metres east to west and just under two and a half metres north to south. That modest enclosure, barely large enough for a family to sleep in, is not an isolated curiosity. It sits within the remains of a pre-bog field system, a network of walls and enclosures that were already ancient when the bog began to swallow them, preserving the outline of an organised, working countryside that has otherwise vanished entirely from view.

Pre-bog field systems are exactly what the name suggests: agricultural landscapes that predate the formation of the blanket peat now covering much of upland Ireland. As the climate became wetter and cooler in the centuries after the Neolithic and into the Bronze Age, bog growth advanced steadily across previously farmed ground, sealing walls, hut platforms, and field boundaries beneath layers of peat. At Ballagh, one of the old field walls still abuts the hut site along its south-south-east arc, meaning the two were in use at the same time, part of the same small world. What makes this site particularly telling is its clustering. Another hut site sits just eight metres to the north-west, a third is eight metres to the north, and a fourth lies forty metres to the south-west. These were not isolated shelters; they were neighbours, part of a community arranged across a field-divided hillside before the bog closed over everything.