City Free Delivery

Free City Delivery began under the eye of Joseph Briggs, a Cleveland, Ohio, postal employee.

The letter carrier's mailbag is an easily identifiable icon of the service.

Most American households did not have mailboxes before 1916, the year the Post Office Department made them mandatory.

Before households had mailboxes, postmen really did ring twice to signal the mail's arrival.

Letter carriers' uniforms have changed over the years, but they continue to be easy to recognize.

Pneumatic tube service began in 1893 in Philadelphia, carrying mail underground at 35 miles per hour.

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