The category itself is worth a moment's explanation: burnt mounds are among the most common prehistoric monuments in Ireland, typically taking the form of a kidney- or horseshoe-shaped mound of fire-cracked stones and darkened soil, the accumulated debris of repeated episodes of heating water, most likely for cooking or bathing. They are frequently found beside streams or in boggy ground, which is exactly the setting recorded here. What makes this particular example quietly notable is that it exists now primarily as a bureaucratic memory: recorded, measured, and then gone.

In 1997, a spread of heat-shattered stones and charcoal-enriched soil was documented at this location, measuring roughly 20.5 metres north to south and 16.5 metres east to west, a substantial footprint by any reckoning. The information came by way of Seán Ó hUigín, presumably someone with local knowledge of the ground. When the site was inspected again in 2004, no visible remains could be found. Whether the mound had been disturbed by agricultural work, subsumed back into the marsh, or had simply never been prominent enough to read clearly from the surface is not recorded. What survives is the coordinate, the dimensions, and the charcoal-dark soil that someone once noticed and thought worth noting down.

There is little a visitor could practically do with this one. The field at Rosslague holds no upstanding remains, no marker, and no obvious trace of what was once spread across a considerable area of its slope. The site sits in the record as a kind of placeholder, a reminder that the prehistoric landscape of County Cork was worked, heated, and inhabited in ways that have largely returned to the earth.