Lady in black, daguerreotype - Public domain portrait painting

Lady in Black, Hallmarked 1/6th-Plate Daguerreotype, Circa 1855:
Plate is Hallmarked "WHH 40". The sitter is probably in mourning and may be wearing a hair memorial brooch, although the gold paint has made it impossible to tell.
License on Flickr (2012-03-18): All rights reserved
Flickr tags: mourning, victorian, vintage, daguerreotype, ambrotype, portrait, early photography, tintype