In the pastureland of Garrafine in County Galway, a hachured marking on the 1932 edition of the OS six-inch map, the kind of shading cartographers used to indicate a hollow or depression in the terrain, drew enough attention to warrant a visit more than fifty years after it was printed. When someone finally went to look in 1983, they found an overgrown hollow, most likely the remains of a disused sand or gravel pit, the sort of small extractive workings that were once common across rural Ireland wherever road-making, building, or drainage called for ready local material.

Because the pit almost certainly dates to after 1700, it falls outside the scope of archaeological classification, which generally concerns itself with earlier remains. That administrative boundary is not without interest in itself. The working landscape of post-medieval rural Ireland, the quarrying, draining, and digging that shaped fields and roads across the eighteenth and nineteenth centuries, left marks that maps recorded faithfully but that often resist the categories used to preserve or study them. Here in Garrafine, what the map caught was ordinary industrial memory: a depression in a field, grassed over, its original purpose probable rather than certain.