I'm subscribed to another forum devoted to topics so foul I could be thrown off XMARKS just for mentioning the subject matter. However one can learn interesting things there that have bearing here. For example, consider this:

Tories who broke Goal at Frederick Town on the night of the 23rd September 1776.

Alexander McCraw a Scotchman, a well made man about five feet nine inches high, had on a coarse hunting shirt and leather breeches, a pair of striped trousers and pale blue yarn stockings, a pair of shoes and scotch bonnet.

Hennith Sewart a Scotchman well made about five feel nine Inches high, wears a long hunting shirt with pockets in the sides of it, a pair of leather breeches, white stockings, a brown surtout coat and scotch bonnet, pretends to have some knowledge in Physick.

There were other escapees, but only the two Scots relate to our studies. The Scots who busted out were to be identified by there bonnets but not by kilts or tartan.