That ambiguity is itself part of what makes it interesting. Cairns of this kind, loose mounds of stone heaped up at intervals along a boundary, served as unmistakable landmarks in an era before fencing or GPS, their meaning legible to anyone who knew the landscape. This one was apparently part of a group of five, strung out near the mountain's upper reaches to mark where one county ended and the other began.

The 1937 OS six-inch map, a meticulous mid-twentieth-century revision of the nineteenth-century Ordnance Survey, captured the cairn's position at a moment when such features were still visible enough to map. Whether it was already ancient by that point, or a relatively modern boundary marker, the notes do not say. What is clear is that four companion cairns were recorded in the same area, suggesting a deliberate series rather than a single incidental heap. Boundary cairns like these occupy a peculiar category: too functional to be ceremonial monuments, too embedded in the land to be easily dismissed, and just ambiguous enough in origin that they resist neat classification.