Karst is the term for terrain shaped by the slow dissolution of soluble rock, typically limestone, producing a characteristically bare, fissured surface where soil is thin and the ground can feel almost skeletal underfoot. It is not the kind of place where traces of human activity tend to announce themselves clearly, which makes the fragmentary record of this particular boundary all the more quietly interesting.

Sometime in the 1940s, the base of a stone wall was recorded here, visible as orthostatic stones, that is, upright slabs set vertically into the ground as structural elements, near an associated house site. By 1993, however, when the area was revisited, that feature was no longer noted. Whether it had become obscured by vegetation, had been disturbed, or simply went unlocated on that occasion is not recorded. What remains is a gap between two moments of observation, separated by roughly half a century, with the earlier one capturing something the later one could not confirm.