It is not a dramatic ruin or a monument with a sign beside it. It is, by all accounts, a smear of darkened earth and fire-cracked stone, the kind of thing a farmer notices and mentions, and which then quietly enters the archaeological record.

What the burnt spread likely represents is a fulacht fia, one of the most common prehistoric monument types in Ireland and yet one of the least understood. The term refers to a cooking site, typically Bronze Age in date, where stones were heated in a fire and then dropped into a water-filled trough to bring it to the boil. The process left behind a characteristic mound of shattered, heat-fractured stone, often horseshoe-shaped, usually found near a stream or boggy ground. Thousands of these sites are known across the country, but their precise purpose has been debated for decades, with proposals ranging from communal food preparation to hide-working, brewing, or bathing. The site at Mashanaglass was recorded on the basis of local information alone, with the spread of burnt material observed after ploughing disturbed the ground. No formal inspection of the site had been carried out at the time it was documented.