Quote Originally Posted by M. A. C. Newsome
A twelfth century account written by Guibert of Nogent, of a vision of demons he had, describes them as wearing their scrips (a type of pilgrim's pouch) "in the manner of the Scots, forward from their haunches, as they are wont..."

What does this tell us? That even by the twelfth century, the Scots were well known enough for wearing their pouches to the front that a Frenchman could make a reference to it and expect to be understood.
Could it be that Scots figured it was easier to protect their scrips from the attentions of cutpurses if worn in front?