Boat Railway Post Office

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Route Agents 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 and Mississippi 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 City, New York and San Juan, Puerto Rico, New York and Canal Zone, plus several routes from Seattle, Washington to Alaska 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 Wolfeboro, New Hampshire and Merrymount RPO lost its Boat RPO status upon its last trip of the season on September 15, 1978. The title "RPO" was completely erased when the Lake Winnipesaukee, New Hampshire RPO closed its operating season on September 30, 1978. These two boat routes still carry mail and operate as a water-borne rural free delivery route, but no longer have their distinctive RPO postmark.

Source: * Wilking, Clarence. (1985) The Railway Mail Service, Railway Mail Service Library, Boyce, Virginia. Available as a MS Word file at http://www.railwaymailservicelibrary.org/articles/THE_RMS.DOC