Somewhere beneath a stretch of pasture on the northern bank of a stream in west Cork, burnt material has been recorded here by local knowledge alone, with no visible surface trace remaining. The site is classified as a fulacht fia, the term used for a type of prehistoric cooking or industrial site found in enormous numbers across Ireland. These are typically identified by a mound of fire-cracked stones, often horseshoe-shaped, accumulated over repeated use beside a water source. The stones were heated and dropped into a water-filled trough to bring it to a boil. At Knockskagh, even that familiar mound has gone, leaving only the burnt residue underground and the memory held by people in the locality.

Fulachtaí fia are among the most common archaeological monument types in Ireland, with thousands recorded, yet individual sites like this one quietly slip from the visible record. The proximity to a stream is typical; water was essential to the process, and these sites cluster along watercourses throughout the Cork landscape. The burnt material noted here is the characteristic signature, the scorched and shattered stone that accumulates when rocks are repeatedly heated and cooled. Without excavation, very little more can be said about when this particular site was in use, though most fulachtaí fia date to the Bronze Age, broadly speaking the period from around 2500 to 500 BC.