In the gently rolling pastureland of Lisgub, County Galway, a hachured feature on the 1932 edition of the Ordnance Survey six-inch map drew enough attention to warrant a closer look. Hachuring, the use of short radiating lines to indicate a depression or slope, can signal earthworks of real antiquity, so the notation was taken seriously. When the site was inspected in 1983, it turned out to be a small, hollow, disused gravel pit, almost certainly dug to supply local agricultural or road-building needs at some point after 1700. Unremarkable in itself, perhaps, but quietly instructive about the gap between what a map seems to promise and what the ground actually holds.