Hachures, the short radiating lines cartographers used to suggest slopes or depressions, can indicate anything from ancient earthworks to natural hollows, and for decades this particular symbol was simply that: an unexplained mark on a sheet of paper. When someone finally went to look in 1983, the feature turned out to be a disused quarry, almost certainly worked at some point after 1700.

Its post-medieval date is precisely why so little official attention has been paid to it. Archaeological survey work in Ireland has tended to focus on sites predating AD 1700, meaning a quarry of this period falls outside the scope of formal prehistoric and early historic recording. That administrative boundary, though practical for archaeologists, has the effect of leaving a whole category of industrial and rural working landscapes in a kind of documentary gap. Quarries like this one were the quiet infrastructure of local life, supplying stone for field walls, roads, and buildings, and the people who worked them left few written records.