Field boundaries of this kind, whether built from cleared stone, raised earthen banks, or combinations of both, are among the most common yet most consistently overlooked archaeological features in the Irish countryside. On a remote Atlantic island, however, they take on a different quality. Every stone shifted and every boundary drawn represented a deliberate effort to organise and hold land on a place where the margin between subsistence and failure was narrow.

Inis Gé Theas, sometimes anglicised as South Inishkea, is one of the Inishkea Islands lying off the Mullet Peninsula in northwest Mayo. The islands were inhabited for a considerable period before their final evacuation in 1931, following a tragedy in which ten young men from the community drowned during a sudden storm. Before that, islanders had kept cattle, cut turf, and fished from a place that was connected to the mainland only by the willingness of the sea. The field systems that survive across the island are physical traces of that long occupation, marking out where families worked and grazed and grew what they could in thin Atlantic soil.