Postcards are a very unprivate form of communication, and that's what makes them so cheap. I am willing to wager that every postcard that has been sent through the us have been read by at least 12 people. It is a little funny now to read postcards in our collection that, you know, individuals meant for their friends and family, and here they are in this public archive,. Everybodyis reading them, and we're reading them because they're historically, have some historical interest to us.