I happened to see a very interesting documentary on the Library of Congress. They are in the process of digitizing their vast collection which includes an abundance of photographs. They have an incredible staff of restorers and preservationists. It may be possible to obtain information about some of the questions posed on some of the APUG threads (?). I just thought I would pass this on. http://www.loc.gov

http://www.jeffreyglasser.com/