Thank you for visiting Postcards from the Rock. The links below will allow you to write or pick up a digital postcard. We also offer a free mail service at zzn.com. You can sign up for that below. (If you use our email to harass or spam, we will expel you.) While you are here, please take the time to visit Alcatraz: The Warden Johnston Years, my site dedicated to Alcatraz in the Age of the Public Enemies (1933 to 1948). Here you will find original documents, photographs, and articles about both famous and obscure prisoners who lived on the Rock.