The travelling post-office deserves special attention, not less on account of the interesting nature of the work performed, than because it serves many important ends in the system of which it forms a part. It is to the railway post-offices that the Department is indebted for much of the simplification of its accounts. At different points in a mail-coach journey, long stoppages used to be made in order that the "bye" and "forward" letters might get sorted; on the introduction of railways, it was seen that the number of bags must either be enormously increased, and other complications arise, or the railways could not to any extent be rendered available for post-office purposes. Just at this juncture, it was suggested that the work might be done during the journey, and the obstacles were soon surmounted. Further, by means of the travelling offices, the Post-Office is enabled to offer more time for the posting of letters, and not only so, but to give the public the benefit of earlier deliveries. The railway-mail service has now assumed quite gigantic proportions. Twenty-six years ago, when railways were only partially used for post-office purposes, a writer predicted that they would "soon become the _ne plus ultra_ of rapidity," and that the Post-Office would have to take to them more and more. "In a few years," said the writer, "railways will have become so general, that scarcely a mail-coach will be left in England; certainly, none will be wanted in London." Both predictions have since been verified; for the last twenty years, railways have gradually absorbed all the mail contracts,--year by year the estimates for this service showing a corresponding increase.[155] The first railway post-office journey was made on the Grand Junction Railway, between Liverpool and Birmingham, on the 1st of July, 1837. When the line was completed to London, in January, 1838, the travelling office started from the metropolis. The following curious account of the "Grand Northern Railway Post-Office," as it was called, is culled from the _Penny Magazine_. "On the arrival of the four 'accelerators' at the Euston Station with the mails, the railway servants immediately carry the large sacks to a huge looking machine, with a tender attached to it, both at the end of the train. This caravan is the flying Post-Office, with a table for sorting letters, and holes round the walls for their reception." The carriage was certainly either an ungainly structure, or the above is a most ungainly report. "In ten minutes," continues the narrator, "the omnibuses are emptied of their contents, and the train of carriages is then _wound up_ to the station at Camden Town, where the engine is attached, _and the Primrose Hill tunnel soon prevents us hearing the thunder of their rapid progress_." The Londoner of 1864, in these days of metropolitan railways can afford to smile at this last sentence. That the change in the system of mail conveyance wrought