No, I’m not a Borderer, although I’m proud to carry a Border name.
The Steel Bonnets by GMF is a marvellous book. My copy is heavily dogeared 
One thing it does show in connection with this thread is the utter pointlessness of describing someone at the time of Wallace, or indeed for the next 300 years as simply “a Scot”.
You had the Highlanders,essentially to the North, then moving South a belt somewhat equating to todays industrial Central Belt, where the Lowlanders lived, then the Borders.
(Scots always use the term Borders, with an “s”, not the Border of the English)
The Borderers, like the Highlanders, had a society that was very similar in many ways to the North American Indian; far more tribal than national.
Scots allied with English to attack Scots and vice versa.
Even within a “name” factions could be at feud, as with the Kerrs of Ferniehurst and the Kerrs of Cessford.
Another Kerr, Sir Mark Kerr, led the Government (not English, anymore than the other sides were the Scots) Cavalry at Culloden.
So much of Scottish history is misunderstood by foreigners, even the English, because they assume that a Scot was a Scot in the sense of belonging to a national identity, when nothing could be further from the truth.
As for the Lowlanders, including Wallace himself, they were classed by the Highlanders as “sassenachs” just like the English.
(edited to add the word “cavalry” missed from my original post)
