Links to related information on other sites:

Care and preservation of fans 
http://www.hants.gov.uk/museum/fans/fans03.html

Fan Collection Preserved 
http://sul-server-2.stanford.edu/waac/wn/ wn05/wn05-1/wn05-104.html

Storage Mounts for Feathered Headdresses and Soft-Sided Hats and Caps (Conserve-o-gram 5/2) - (An Adobe PDF file) 
http://www.cr.nps.gov/museum/publications/ conserveogram/05-02.pdf