It reads as a slight irregularity in a field, easily mistaken for a natural rise or a disturbance left by farm machinery. What it actually represents is the residue of a Bronze Age cooking site, a fulacht fia, and the reason it is barely visible today is precisely because it has been there for perhaps three or four thousand years.

A fulacht fia is a type of ancient cooking place found in great numbers across Ireland, typically consisting of a trough dug into the ground, a nearby water source, and a hearth for heating stones. The stones were heated in fire and then dropped into the water-filled trough to bring it to a boil. Over repeated use, those stones would shatter and become useless, and the broken, fire-cracked fragments were raked out and piled nearby. That accumulated pile of burnt and shattered stone is what survives in the landscape, forming the characteristic horseshoe-shaped or oval mounds that archaeologists recognise. The mound at Ballyhoolahan Middle is described as barely perceptible, which is not unusual; many such sites have been worn down by centuries of agriculture, animal grazing, and the slow settling of the land around them.