But this kind of deposit, known as a burnt mound, is among the more puzzling recurring features of the Irish archaeological landscape. Burnt mounds are typically Bronze Age in date and are thought to relate to the repeated heating of stones in fire, then dropping them into water-filled troughs to bring the water to the boil. What the boiling water was actually for remains contested: cooking, bathing, textile processing, and ritual use have all been proposed, often in the same breath.

This particular spread, at Kilbride in County Wicklow, came to light during excavation work connected to the Arklow bypass road scheme. Archaeologist Brendán Ó Riordáin carried out the excavation in 1997, and the deposit he uncovered was modest in extent but characteristic in composition: burnt stone and charcoal mixed with patches of grey and yellow marl, the latter a fine-grained calcareous clay that sometimes accumulates naturally in waterlogged or low-lying ground. The combination of fire-cracked stone and organic residue in such a setting is precisely what one would expect from repeated high-temperature activity over a contained area, and the presence of marl hints at the kind of damp, marginal terrain where burnt mounds most commonly appear across Ireland.