Someone, at some unknown point in the past, chose to build or shelter within the ready-made enclosure of an older earthwork, using its banks and the slight rise of the ground as both landmark and windbreak.

Ringforts are roughly circular enclosures defined by earthen banks and ditches, built mainly during the early medieval period in Ireland, though they were used and reused across many centuries. The fort at Jamestown sits on gently undulating pasture and scrub, overlooked by a low rise to the east and north-east. The house within it has no confirmed date; it could belong to the medieval period, the post-medieval era, or somewhere in between. What is clear is that whoever occupied it was making pragmatic use of an already-shaped landscape, tucking a small structure into the sheltered corner of an enclosure that had been raised by entirely different hands, for entirely different purposes, long before.