Hachures, those short radiating lines cartographers use to suggest a depression or raised feature in the landscape, gave no further clue as to what the thing actually was. It took nearly fifty years and a physical visit to find out.

When someone finally went to look in 1983, the feature turned out to be a disused quarry pit, almost certainly dug sometime after 1700. Quarry pits of this kind were a practical feature of rural Irish life for centuries, typically cut to extract stone for field walls, road surfaces, or building work on nearby farms and estates. Because this one falls within the post-medieval period, it sits outside the scope of archaeological classification, occupying that quiet administrative no-man's-land of sites that are old enough to have vanished from living memory but not old enough to be formally studied as antiquities. The gap between the map being made and anyone checking what it showed amounts to nearly half a century, which says something about how much can sit unexamined in plain sight.