[Ansteorra] Plague Doctor's Mask Documentation?

[~*Rhiannon]

I am looking for documentation earlier than 17th century for a plague
doctor's mask, similar if possible to the one on the right in this photo:
http://2.bp.blogspot.com/-vv9Olqy2BLs/Tq7g5l2fKwI/AAAAAAAABhA/LDXV0oowzi0/s1600/classic%2Bversus%2Briveted.jpg

Or, if for some reason that link doesn't work, the plague doctor's mask at
his main site, which is http://tombanwell.blogspot.com/

I would appreciate any info.

Thanks,

Rhiannon
(cool SCA name pending)