What they were likely looking at was a fulacht fia, a type of prehistoric cooking site found in extraordinary numbers across Ireland, typically identified by a horseshoe-shaped mound of fire-cracked stone and charcoal built up over generations of use. The basic method involved heating stones in a fire and dropping them into a water-filled trough to bring it to a boil, a process that gradually shattered the stones and created the characteristic burnt mounds that survive in the landscape. This particular example was set in sandy, gravelly ground beside running water, exactly the kind of low-lying, well-watered spot where fulachta fia are most commonly found.

Something erased it before it could be properly studied. The site sits within a sand and gravel works, and industrial extraction of those materials has left no visible surface trace of what the 1938 map recorded. The mound is gone, or buried beyond recognition, swallowed by the same loose, workable ground that once made it a convenient spot for prehistoric activity. It joins a long and quiet list of Irish archaeological sites that survived millennia only to disappear within living memory, known now only through a mark on an old map and a brief note acknowledging the absence of anything left to see.