On the 1944 to 1945 revision of the Ordnance Survey six-inch map, the feature appears as a hachured symbol, the kind of hatching cartographers use to indicate a hollow or earthwork of uncertain character. It looked, on paper at least, like something worth noting.

When someone finally went to look in person, in 1984, the mystery resolved itself quietly. The feature was a disused quarry, post-dating 1700, cut into the side of that gentle rise in the land. Small-scale quarries of this kind were once common across rural Ireland, opened to extract stone for field walls, farm buildings, or road repairs, and then simply abandoned when the need passed or the stone ran out. This one left behind only a hollow in the hillside and a cartographic question mark that took four decades to answer.