This is a midden, the archaeological term for a deposit of domestic refuse, most often food waste, that accumulates wherever people live and eat over time. Middens are among the most straightforward kinds of site a field archaeologist can encounter, and yet they carry an immediacy that grander monuments sometimes lack. Someone gathered limpets on this shoreline, cracked them open, and discarded the shells. The shells remained.

The deposit itself is modest in dimension but precise in its details. Exposed in the eroding face of the dune on its north-eastern side, the midden appears as a lens of shell approximately four metres long and only five to six centimetres deep, sitting roughly halfway down a section face that stands between 0.8 and one metre high. The shells are predominantly limpet, and notably large ones at that, with occasional periwinkles mixed through a matrix of dark sand. Above the deposit lies about 0.4 metres of pale grey sand, and below it an equivalent depth of clean, sterile pale sand entirely free of material. That sandwich of layers tells a coherent story: the midden did not accumulate gradually across a long sequence of occupation but was sealed at some point, leaving it suspended between two phases of natural dune formation. The layer itself slopes gently down towards the south-east, following the natural fall of the dune towards a boulder-strewn strip and then the bare rock of the shore beyond. Adding to the picture, a ruined house sits approximately eight metres to the west on the north-western edge of the same dune, hinting at a broader pattern of habitation on this exposed peninsula tip.

The location compounds the interest. A narrow rocky gully, partly submerged at high tide, separates this corner of the island from the rest of Inishkea North, and a sea channel roughly eighty metres wide lies between it and the northern end of Inishkea South. Whoever gathered shellfish here was working at the very edge of things, on a sliver of land almost entirely surrounded by water, within sight of a neighbouring island.