On the 1944 to 1945 revision of the Ordnance Survey six-inch map, a hachured marking, the cartographic shorthand for a depression or earthwork in the landscape, was recorded at Lisdooaun in County Galway. It sat there on paper, ambiguous, until a field inspection in 1984 finally resolved the question: the feature was nothing more, and nothing less, than a disused sand or gravel pit.