Robbie,
You should check out this link. The book which is excerpted is forwarded by Dr D. Gordon Teall of Teallach, F.S.T.S.

He is the Executive President of The Scottish Tartans Society

http://www.kiltsnmore.com/history/dress.htm

There is a lot of misinformation out there about the origins of kilts. I'm happy to find a sensible site on the subject.

In short, the book states that the Scots wore the leine when they emigrated to (now called) Scotland.