So come all classes of mail to these swift-flying cars--letters, newspapers, packages, the specially protected registered mail,--and for all of these classes the apparently endless sorting goes steadily forward, while the train rounds sharp curves and sends the ordinarily sure-footed clerks clutching handrails for balance, under the dead glow of acetylene, holding each separate mail-piece for a fraction of a second--sometimes longer if it be a "sticker" in the chirography or the detail of its address--and then shooting it into the proper pigeon-hole or open-mouthed pouch. Some of these cars are destined for cities or States or groups of States--the wheels under one of them are not going to cease revolving for any length of time until it stands on the long Mole, opposite San Francisco, and the through pouches, with the British coat-of-arms and the meaningful "G. R." stamped upon them, are being shipped aboard the red-funnelled steamship which is to carry them on the last leg of their long journey over two seas and a broad continent, from London to Hong Kong. These trains are no longer novel on the modern railroad. They are established features of the train service. From New York City goes forward one-sixth of all the mail matter originating in the United States. The aggregate circulation of all the New York morning newspapers is somewhat larger than the aggregate circulation of the morning newspapers of the other cities of the country, so from New York there goes forth between midnight and dawn a flotilla of special mail and newspaper trains. Two of the fastest of these start from the Grand Central Station. The "Boston Special" of the New York, New Haven & Hartford leaves that spacious terminal at just 2:10 A. M., no matter what desperate excuses may be telephoned at the last moment by some circulation manager who is confronted by a disabled press, or some such disaster. It slips through the suburban territory without halting--the nearby commuters are served with their papers and their mail by the early morning locals. Bridgeport, at 3:31 A. M., is the first halt; New Haven, at 3:52, the second. At New Haven, the papers for Hartford, Springfield, and the whole Connecticut valley country are thrown off. At New London, which is reached at 4:53 A. M., go the papers for Norwich, Worcester, Newport, and New Bedford. One more halt, at Providence, and the train, running as fast as the fastest of New Haven flyers, is at the South Station, Boston--at just 7:20 o'clock. A Boston & Maine flyer, taking mail and newspapers away up the coast through three States, leaves the North Station at 8:01 A. M., and so there follows a quick transfer of mail and newspapers through the twisting streets of the Hub.