Uploader's Comments

Boundaries across land generally come in the form of walls, fences and hedges. OS mapping shows a number of lines across the summit ridge of Beinn Bhreac which might be expected to be fences or dry stone walls but these are not. The dark line seen in the centre of the image running away towards the obvious hill top is in fact a turfed rib, presumably with peats lain over a low boulder line - the dark horizontal band at the left side is certainly of that nature. The demarcation is surely to mark a boundary line.