No mound, no scorched stones, no trace of a hollow in the earth. What survives is a single memory, belonging to the landowner, of a low mound of burnt, stony soil that was levelled during field drainage. That act of tidying, routine and practical, removed what was most likely a fulacht fia, one of the most common prehistoric monuments in the Irish landscape.

A fulacht fia is a burnt mound, the accumulated debris of a cooking or heating method used repeatedly over long periods, typically during the Bronze Age. The process involved heating stones in a fire and dropping them into a water-filled trough to bring the water to the boil. The stones shatter with the thermal shock, and over many uses the broken, fire-cracked fragments pile up into a horseshoe-shaped mound around the trough, usually dark and rich with charcoal. The site at Crohane fits the pattern closely, even now: a number of natural springs rise directly to the east, providing exactly the kind of reliable water source these sites consistently favour. About ninety metres to the north-east, a confirmed fulacht fia survives, making it quite plausible that this levelled mound was another example of the same type, perhaps used by the same community across the same low ground.