Are extremely valuable Bill ; at least one of these is an albumen print and I would not be surprised if the other two were not also.
Cartes De Visite from the 19th C. if they are of famous people are auction gold!
I believe an Edward Steichen print recently went for over a million dollars at auction.
Brady and Sullivan's original prints are priceless .
http://www.howardgreenberg.com/
Psssst!
I have a signed 8X10 B&W by Minor White if you're interested ........
