Hachuring, the use of short radiating lines to suggest a depression or slope, was a standard cartographic shorthand, and this particular marking could have indicated almost anything: a hollow, an earthwork, the ghost of something older. When someone went to look in 1986, the ground told a more modest story. It was a disused quarry, almost certainly worked sometime after 1700, and unremarkable enough that it fell outside the scope of any formal archaeological record.