Many people know the U.S. Mail once traveled by train, but did you also know that some mail traveled by streetcar?  The Union Street Ry. operated a Railway Post Office (RPO) route from the main railroad station in Providence, RI to Fall River and New Bedford, Mass.  A mail case onboard allowed postal workers to sort mail as the car rolled from post office to post office.  Express shipments were also handled.  This car has just completed an extensive restoration to operating condition thanks in part to funding from the 2014 H. Albert Webb Railroad Preservation Award.