(c) 2006-present R. Macaraeg
* Calasibetta 1975 p21
"Balmoral cap or bonnet Flat Scottish beret, similar to a tam-o'-shanter, usually dark blue with a red pompon on top, with crest and badge of the clan on one side; part of traditional Highland dress."
* Byrd 1996 p33
"The Glengarry cap of today started as a cut down version of the old flat bonnet and was considered more ornamental than practical."