was transported over water in the United States
in the later nineteenth and the twentieth century.
and, later, Railway Post Office
(RPO) clerks were placed on inland boat lines at a very early date; postmarks go back to 1857. By the 1890s the famed river packets and steamers on the Ohio
rivers usually carried RPO mail units, such as the old Cairo & Memphis, and the Vicksburg & New Orleans. Many lakes boasted of this service. In 1902, 82 clerks were serving on 49 boat routes. The last year-round service of this type was in the state of Washington; the Bellingham & Anacortes lasted until 1950.
The longest Boat RPOs operated between New York
and San Juan, Puerto Rico
, New York and Canal Zone
, plus several routes from Seattle
ports. These were all discontinued with the on-set of World War II
Two Boat RPOs outlived their railway route counterparts. The last rail route made its final trip between New York and Washington, DC
on June 30, 1977. The Wolfboro
& Merrymount RPO lost its Boat RPO status upon its last trip of the season on Lake Winnipesaukee
on September 15, 1978. The title "RPO" was completely erased when the New Hampshire RPO closed its operating season on September 30, 1978. These two boat routes still carry mail and operate as water-borne rural free delivery
routes, but no longer have their distinctive RPO
- Wilking, Clarence. (1985)......