In Canada and the United States, a railway post office, commonly abbreviated as RPO, was a railroad car that was normally operated in passenger service and used specifically for staff to sort mail en route, in order to speed delivery. The RPO was staffed by highly trained Railway Mail Service postal clerks, and was off-limits to the passengers on the train.
From the middle of the 19th century, many American railroads earned substantial revenues through contracts with the U.S. Post Office Department (USPOD) to carry mail aboard high-speed passenger trains. The Railway Mail Service enforced various standardized designs on RPOs. A number of railway companies maintained nominally unprofitable passenger routes, having found that their financial losses from moving people were more than offset by transporting the mail on such passenger routes.
History The world's first official carriage of mail by rail was by the United Kingdom's General Post Office in November 1830, using adapted railway carriages on the Liverpool and Manchester Railway. Sorting of mail en-route first occurred in the United Kingdom with the introduction of the travelling post office in 1838 on the Grand Junction Railway,Johnson 1995. following the introduction of the Railways (Conveyance of Mails) Act 1838.
In the United States, some references suggest that the first shipment of mail carried on a train (sorted at the endpoints and carried in a bag on the train with other baggage) occurred in 1831 on the South Carolina Rail Road. Other sources state that the first official contract to regularly carry mail on a train was made with the Baltimore and Ohio Railroad in either 1834 or 1835. The United States Congress officially designated all railroads as official postal routes on July 7, 1838.White, p 472. Similar services were introduced on Canadian railroads in 1859.White, p 473
The railway post office was introduced in the United States on July 28, 1862, using converted baggage cars on the Hannibal and St. Joseph Railroad (which also delivered the first letter to the Pony Express). Purpose-built Railway Post Office (RPO) cars entered service on this line a few weeks after the service was initiated. They were used by staff to separate mail for connection with a westbound stagecoach departing soon after the train's arrival at St. Joseph. This service lasted approximately one year.White, p 475.
The first permanent Railway Post Office route was established on August 28, 1864, between Chicago, Illinois, and Clinton, Iowa. This service is distinguished from the 1862 operation because mail was sorted to and received from each post office along the route, as well as major post offices beyond the route's end-points.
George B. Armstrong, assistant postmaster at Chicago, originally came up with the idea of having mail processed and distributed while the mail was on board, en route in mail cars. With the assistance of Schuyler Colfax, Speaker of the House at the time, and A. N. Zevely, Third Assistant Postmaster General, Armstrong was authorized to test his ideas.
In 1869, the Railway Mail Service (RMS), headed by George B. Armstrong, was officially inaugurated to handle the transportation and sorting of mail aboard trains. Armstrong was promoted from a supervisory position in the Chicago post office following his experiments in 1864 with a converted route agent's car on runs between Chicago and Clinton, Iowa.White, pp 475–476.
RPO car interiors, which at first consisted of solid wood furniture and fixtures, were soon redesigned to support their new purpose. In 1879, an RMS employee named Charles R. Harrison developed a new set of fixtures that soon gained widespread use. Harrison's design consisted of hinged, cast-iron fixtures that could be unfolded and set up in a number of configurations to hold mail pouches, racks and a sorting table as needed for specific routes. The fixtures were also designed so they could be folded away completely to provide a wholly open space to carry general baggage and express shipments as needed by the railroads. Harrison followed through with manufacturing his design at a factory he opened in Fond du Lac, Wisconsin in 1881.White, pp 481–482.
The July 1, 1862, Pacific Railroad Act signed by President Lincoln established government funding for the construction of a railroad from the Missouri River to the Pacific Ocean in order to open a main line mail route across the western frontier. The act was officially entitled "AN ACT to aid in the construction of a railroad and telegraph line from the Missouri river to the Pacific Ocean, and to secure to the government the use of the same for postal, military, and other purposes". The Act authorized government-funded railroad mail routes across the American continent.
By the 1880s, railway post office routes were operating on the vast majority of passenger trains in the United States. A complex network of interconnected routes allowed mail to be transported and delivered in a remarkably short time. As many as a dozen clerks might work in a single RPO car, although fewer would be required if part of the car was used for transport of previously sorted mail or (often in a separate compartment) express and baggage.
Railway mail clerks were subjected to stringent training and regular testing of details regarding their handling of the mail. On a given RPO route, each clerk was expected to know not only the post offices and rail junctions along the route, but also specific local delivery details within each of the larger cities served by the route. Periodic testing demanded both accuracy and speed in sorting mail, and a clerk scoring only 96% accuracy would likely receive a warning from the Railway Mail Service division superintendent. Interurban and Streetcar systems were also known to operate RPOs. The Boston Elevated Railway car was noted for making circuits of the city to pick up mail.Trolley Car Treasury by Frank Rowsome Jr. McGraw-Hill, New York, 1956 -Library of Congress 56-11054
In the United States, RPO cars (also known as mail cars or postal cars) were equipped and staffed to handle most back-end postal processing functions. First class mail, magazines and newspapers were all sorted, cancelled when necessary, and dispatched to post offices in towns along the route. Registered mail was also handled. The foreman in charge was required to carry a regulation pistol while on duty to discourage theft of the mail.
Standardization
Because of the physical and mental demands placed on RPO clerks, the Railway Mail Service pushed the adoption of standardized floor plans and fixtures for all RPO cars, with the first plans published in 1885. The RMS also pressed for improved lighting fixtures to help the clerks see the addresses on the mail they sorted, first by improving the reflectors in the 1880s, then calling for discontinuance of oil lamps in the 1890s and the first experiments with electric lighting in 1912. Clerks' safety was also of great concern to the RMS, with the first comprehensive statistics on work-related injuries published in 1877.White, p 482.
Through the second half of the 19th century, most RPO cars were painted in a somewhat uniform color scheme regardless of the railroad that owned or operated them. Most were painted white with trim in either buff, red or blue, which made the cars stand out from the other cars. By the 1890s, this practice had waned as railroads painted their RPO cars to match the rest of their passenger equipment. One RPO car that was displayed at the 1893 World's Columbian Exposition in Chicago is one of the last known examples of the early white color scheme.White, p 480.
As the development of passenger cars progressed, so too did the development of RPO cars. The first plans for RPO car designs were based on light baggage car frames and bodies, which sometimes resulted in catastrophe for RMS employees when the trains were involved in accidents. From 1900 to 1906 some 70 workers were killed in train wrecks while on duty in the RPOs, leading to demands for stronger steel cars.Daily Mirror, March 16, 1906, p6, Last night's news The RMS developed its first standards for car design in 1891 to address some of these issues.White, p 483.
In 1912, the Railway Mail Service developed a set of strength requirements for new cars in an effort to push the car building companies into using steel for the cars' major structural components and underframes. The core of the requirements was that each car should be able to withstand a buffer force of at least 400,000 pounds. This requirement was doubled to 800,000 pounds in a 1938 revision of the standards. The requirements were again strengthened in 1945 with specifications that precluded the use of aluminium for framing and major structural components. The 1945 revisions also included a requirement for end posts to prevent telescoping in the event of a collision. Railway car manufacturers adopted these requirements and carried them through to all other models of passenger cars that they built.White, p 190.
The 800,000-lb buffer load and end post requirements were later adopted by the Interstate Commerce Commission (ICC) for all passenger MU locomotives as of April 1, 1956. They were extended to all passenger cars and locomotives in 1999 by the USDOT.
An interesting feature of most RPO cars was a hook that could be used to snatch a leather or canvas pouch of outgoing mail hanging on a track-side mail crane at smaller towns where the train did not stop. The first US patent for such a device () was awarded to L. F. Ward of Elyria, Ohio, on January 29, 1867.White, p 476 This was about a year after apparatus for picking up and setting down mailbags without stopping was installed for equivalent UK TPOs at Slough and Maidenhead, having first been patented in UK in 1838 by Nathaniel Worsdell.
With the train often operating at 70 mph or more, a postal clerk would have a pouch of mail ready to be dispatched as the train passed the station. In a co-ordinated movement, the catcher arm was swung out to catch the hanging mail pouch while the clerk stood in the open doorway. The mail pouch had a strap around the middle, and the strap was tightened in preparation for pickup with an approximately equivalent weight of mail in either end of the pouch to prevent the heavier end from pulling the lighter end off the catcher arm. As the inbound pouch slammed into the catcher arm, the clerk kicked the outbound mail pouch out of the car, making certain to kick it far enough that it was not sucked back under the train. Outbound pouches of first class mail were sealed with a locked strap for security. Larger sacks with optional provisions for locking were used for newspapers, magazines, and parcel post. An employee of the local post office would retrieve the pouches and sacks and deliver them to the post office.
In the 1950s the Budd Company offered two versions of its self-propelled diesel RDC with RPO: the RDC-3 combine and the RDC-4 (a baggage/mail/express only unit). These models were purchased by the New York Central, Boston & Maine, New Haven Railroad, Rock Island, Pacific Great Eastern, Northern Pacific, Canadian Pacific Railway, Canadian National and Minneapolis & St. Louis.Budd Company Red Lion Plant Order List, Philadelphia Chapter of the National Railway Historical Society. http://www.trainweb.org/phillynrhs/BuddCarOrders.html
Cancellation stamps