Word Study
glengarry bonnet
CIDE DICTIONARY
glengarry bonnet, n. [Name of a valley in Scotland.].
A kind of Highland Scotch cap for men, with straight sides and a hollow top sloping to the back, where it is parted and held together by ribbons or strings.
"The long silk streamers of his Glengarry bonnet." [Webster 1913 Suppl.]
For further exploring for "glengarry bonnet" in Webster Dictionary Online