You heard anything about the cairn on top of Geallaig Hill? It's not on canmore. https://binged.it/2hZasdo
If you ignore the wind shelter built on top of it, the shape looks to have more in common with the old cairns just to the east like on Morven, Pressendye etc compared to the modern cairns on the hills to the west.
Couple of photos - probably just wishful thinking.
The grassy lip is intriguing. If there's a logical historic reason for it to be there you know of.... or can discover... such as poor relief or suchlike, fair enough. But if not, why else would it be there? Assuming it doesn't get masses of walkers?