Has lost its case

Portrait of William Henry Fox Talbot. Note that this is similar to image shown on http://de.wikipedia.org/wiki/William_Henry_Fox_Talbot , presumably taken at the same sitting in 1844. See also http://www.fotomuzej.com/fotografija-na-hartiji.html for another in the sitting.

Claudet received the Royal Warrant on the 9th of July 1855. The daguerreotype cannot be any earlier than that (source, 'Crown and Camera' by Frances Dimond and Roger Taylor).

1st Earl Spencer' written on verso, also scratched into verso 'The celebrated Earl Spencer'. Though it cannot be the first earl as he died before photography was invented.

Portrait of John Flicht