Hachures, the short radiating lines cartographers used to suggest slopes or depressions, could indicate almost anything at that scale: a hollow, an earthwork, a subtle change in ground. When the site was inspected in 1985, it turned out to be a disused quarry, post-1700 in date and therefore outside the scope of formal archaeological classification.

There is something quietly telling about a place whose entire paper trail amounts to a cartographic convention and a brief field visit. The quarry at Ballydonnellan is not ancient enough to be of archaeological concern, yet old enough to have been abandoned, overgrown, and reduced to a mark on a map that took over fifty years to explain. Whoever worked it, whatever stone they extracted and for what purpose, goes unrecorded. It exists in that common but easily overlooked category of post-medieval industrial traces, the small-scale local quarrying that built field walls, farmhouses, and road foundations across rural Ireland, leaving little behind except the scar in the ground itself.