Yet the deposit uncovered at Tinnynarr in County Longford represents precisely the sort of quiet archaeological puzzle that raises more questions than it answers. The find is a burnt spread, a shallow concentration of charcoal-rich soil mixed with fire-cracked stone, measuring roughly a metre across and only twenty centimetres deep. There is nothing else: no pottery, no bone, no structural remains of any kind.

The deposit came to light in 2004 during pre-development testing ahead of the construction of the N4 Edgesworthstown inner relief road. Ground investigations of this kind are routine before road schemes proceed, and they occasionally turn up traces of past activity that would otherwise have gone unnoticed. Here, a single feature was recorded, catalogued as Tinnynarr 005, and subsequently excavated. The results, published by McQuade in 2007, were spare: charcoal-rich soil, burnt stone, and nothing else. Burnt spreads of this type are not uncommon in the Irish archaeological record, and they are often associated with fulacht fiadh, a term used for burnt mound sites that typically consist of fire-shattered stone accumulated beside a water trough, thought to relate to cooking, bathing, or other heat-requiring activities in prehistoric times. Whether that context applies here cannot be said with any confidence, given the absence of the trough, the mound material, or any associated finds that might anchor the deposit to a period or a purpose.