Sorry, being an equal-opportunity nerd, the linkdump continues with late-late stuff. This is what I get for having seventeen projects in the hopper...

Froggie purse
http://www.museumoflondonimages.com/image_details.php?image_id=79023

Coif with critters, including squirrel
http://www.elizabethancostume.net/headwear/pics/coif1.jpg

Misc coifs
http://www.elizabethancostume.net/headwear/coifpics.html

Basic blackwork
http://www.blackworkarchives.com/index.html

Extant examples
http://www.drakt.org/Embroidery.html

Misc sources
http://www.elizabethancostume.net/black-bib.html

Elizabethan embroidery techniques
http://medieval.webcon.net.au/loc_england_elizabethan.html