Red and White Wool and Linen Medieval Hood

This hood is a fantastic hand-sewn example of a medieval wool hood from the 13th-14th century.  The buttons were hand cast pewter, with the lining made from linen.  What a great inspiration piece!

Blue and White Wool and Linen Medieval Hood

I found this photo on flickr of a pretty blue wool hood with cloth buttons done in the period style, hand sewn facings and a linen lining.  I would love to know where I can source documentation regarding the use of contrasting colored cloth buttons on 13th - 14th century clothing.  I have seen painting documentation of the top stitching done in contrasting colors, and will post the painting when I run across it again.