Somewhere in that limestone landscape, among the dense web of ancient field walls and wind-scoured karst, there is a megalithic structure that has not yet been formally described in any publicly accessible record. It sits, catalogued but undocumented in any detail available to the general reader, in a part of Ireland where prehistoric monuments are not unusual company.

The Aran Islands have been inhabited since at least the Neolithic period, and megalithic construction, typically large stone chambers or tomb structures raised by farming communities in the centuries around 4000 to 2500 BC, is well attested across the western seaboard of Ireland. Inis Mór in particular is famous for Dún Aonghasa, the great cashel on its southern cliffs, but the island holds far quieter monuments too, ones that have not attracted the same attention. Eochaill, whose name derives from the Irish for a yew wood, appears in early medieval sources and the area around it preserves traces of habitation across many periods. A megalithic structure recorded here suggests activity in the landscape long before the island's more celebrated stone forts were raised.