On the southern face of a low hummock in the pastureland of Derry townland in County Galway, there sits a stone-filled, partially overgrown gravel pit. It earned its small moment of scrutiny because of a hachured feature, a cartographic marking used to suggest a raised or hollowed landform, that appeared on the 1944 to 1945 revision of the Ordnance Survey six-inch map. That kind of symbol, in that kind of landscape, has a way of catching the eye of anyone scanning old maps for earthworks or enclosures. When someone finally went to look in 1984, the feature turned out to be a working quarry or extraction pit of relatively recent origin, post-dating 1700, and therefore outside the scope of formal archaeological classification.