What form does the portrait take? Is it a:

painting?

 

sculpture?
* bust
* statue
* life mask
* death mask
* head

 

drawing?

 

photograph?
* daguerrotype
* silver or bromide print

mixed media?
* plastic, acrylic paint and wire

 

print?
* engraving, line engraving, steel plate, stipple engraving, copper plate, hand-coloured engraving
* etching
* lithograph
>> National Portrait Gallery, Heinz Archive & Library (http://www.npg.org.uk/research/archive.php)
>> British Museum, Department of Prints & Drawings (http://www.britishmuseum.org/about_us/departments/prints_and_drawings.aspx)
>> Ashmolean Museum, Western Art (http://www.ashmolean.org/departments/westernart/services/index.php)

 

miniature?
* eye portrait
* set in a locket/bracelet/brooch/snuffbox
* cabinet miniature
>> V&A Prints and Drawings (http://www.vam.ac.uk/page/p/paintings/)

 

tomb effigy?

 

silhouette?

 

caricature?
>> British Museum, Department of Prints & Drawings (http://www.britishmuseum.org/about_us/departments/prints_and_drawings.aspx)

 

medal?
>> British Museum Department of Coins & Medals (http://www.britishmuseum.org/about_us/departments/coins_and_medals.aspx)