When the land was ploughed, a spread of burnt material came to the surface, and that brief disturbance is essentially all that is known. There is nothing to see now, no mound, no hollow, no obvious trace of any kind.

What the burnt material almost certainly indicates is a fulacht fia, a type of prehistoric cooking site found in considerable numbers across Ireland, particularly in low-lying or marshy ground. The typical form involves a trough, often timber-lined or stone-lined, filled with water, which was then heated by dropping fire-cracked stones into it. Those stones, once used and discarded, accumulated into a horseshoe-shaped mound of charred and shattered rock around the trough. It is precisely this kind of scorched, fragmented stone that tends to appear when a plough cuts through a field sitting over one of these sites. Most fulachtaí fia date to the Bronze Age, broadly speaking the period between roughly 2000 and 500 BC, though some are earlier or later. They are among the most commonly recorded prehistoric monument types in Ireland, yet individually they remain poorly understood, with debate persisting about whether their primary purpose was cooking, bathing, textile processing, or some combination of uses. The Ballyhoolahan example was noted from local information rather than formal excavation, which means almost everything about it, its date, its extent, its condition below ground, remains unknown.