> There's quite a bit more evidence than that:
> http://www.telegraph.co.uk/news/uknews/1464209/Borders-folk-...
A unit of "Moors". Again, Mediterranean looking North Africans. Despite the misleading title.
> It does no such thing. Can you point to any reputable scholar who is prepared to state such an "upper bound"?
Of course not. The evidence is so thin it wasn't even up for useful scholarly debate.