Hachures on maps of this kind typically indicate slopes or earthworks, the kind of marks that can suggest anything from ancient ringforts to natural ridges. When someone finally went to look at these features on the ground in 1985, the reality was considerably more modest: two disused quarries, overgrown and long since abandoned.

The quarries date to after 1700, which places them firmly in the period of post-medieval land use, when small local quarries were commonly opened to supply stone for field walls, farmsteads, and estate buildings across Connacht. Their post-1700 date is precisely why they sit at the margins of the archaeological record; Ireland's formal archaeological survey concerns itself with earlier remains, and features like these fall just outside that boundary. They were noted, identified, and effectively set aside. What the map had quietly preserved for several decades turned out to be the faint impression of ordinary agricultural industry rather than anything older or more enigmatic.