Other
The Unconstitutionality of the Laws of Congress Prohibiting Private Mails
An exposition by Lysander Spooner on behalf of the American Letter Mail Company entered according to an Act of Congress in1844, asserting that the company should have the right to establish post offices in competition with those of...
Smithsonian Institution
National Postal Museum: Fifteen Objects That Changed Postal History
Useful information about the history of the postal system and about the changes in postal and transportation technologies that have made the U.S. Postal Service what it is today.