That omission is itself quietly telling. The boundaries are low and unassuming, earth and stone banks averaging between 1.7 and 2.2 metres wide and no more than half a metre high, but their geometry is deliberate and precise: straight lines running north to south and east to west, meeting at approximate right angles to form a planned agricultural landscape that has simply been overlooked by the cartographic record.

What makes the site particularly arresting is its relationship to a wedge tomb nearby. A wedge tomb is a type of megalithic burial monument, typically dating to the late Neolithic or early Bronze Age, characterised by a tapering stone-built chamber, wider at one end and narrowing toward the other. The field system at Magheraghanrush is best preserved in the area immediately surrounding this tomb, suggesting that the two features may belong broadly to the same period of land use, or at least that the monument acted as a fixed point around which later farming activity organised itself. Occasional large blocks of limestone are set centrally within the banks, giving the boundaries a structural weight that goes beyond simply clearing stones from cultivable ground. The slight south-south-westerly facing slope would have offered reasonable drainage and some shelter, practical considerations that still speak across millennia of agricultural logic.