These are the traces of a Late Bronze Age hearth, one of four uncovered during research excavations in the western half of the inner enclosure at Dún Aonghasa, the great cliff-edge fort on Inis Mór in the Aran Islands.

Dún Aonghasa is a monument that tends to invite large interpretations, its massive concentric stone walls and sheer Atlantic drop inspiring considerable speculation about ritual and ceremony. The excavation findings offer a quieter counterpoint. The southerly hearth, recorded as F245, was little more than a thin spread of light grey ash and ash-flecked soil, no deeper than eight centimetres at its greatest extent. At its eastern edge, limpet shells had been discarded, and within the surrounding soil, fish bones and scales were identified. Microfossil analysis recovered one barley grain and one grain that could have been either barley or wheat. Roughly three and a half metres away, a second hearth was found, and two further examples came to light to the north of an associated pit. All four features were assigned to the Late Bronze Age, a period broadly spanning from around 1200 to 500 BC in the Irish context. The research was published by Claire Cotter in 2012.

What this collection of hearths suggests, taken together, is that the interior of Dún Aonghasa was at some point a place where people cooked food, processed grain, and ate seafood gathered from the shoreline below. The scale of the evidence is small, but that smallness is itself significant: these are the ordinary residues of ordinary meals, preserved inside a structure that has so often been discussed in extraordinary terms.