which, working by means of a rope and pulley, an iron arm is fixed, upon which the bags to be delivered, securely strapped in a thick, leathern pouch, are suspended. Where the exchange has to be effected at the station we are nearing, the arrangements are just the counterparts of this. A net is spread to catch each pouch from the extended arm of the carriage, and pouches are hung from iron standards in the ground of sufficient height for the net in the train. The operation itself is just commencing. The door is pushed back into the groove in which it works, and then the sorter, touching a spring that holds up the net, it is loosened from its supports, and projects over the carriage-sides; the iron arm, acting on its pulley-rope, is drawn round into the carriage, where the pouch is rapidly fastened to it by means of a catch or spring--but in such a manner that a touch from the net-apparatus at the station will bring it off--and then let down, remaining by virtue of its own weight at right angles to the door. A moment of waiting, and then all the machinery acts its assigned part properly; the pouch disappears from the arm (or arms, if the bags have been heavy enough for two to be used), and at the same moment another descends into the post-office net, and all is over and quiet as before. We mean, of course, comparative quiet, as much as is possible amid the din and endless rattle of a train speeding at the rate of forty miles an hour. We follow the sorter as he makes his way back into the post-office carriage, carrying with him the treasures we have watched him pick up by the wayside. These new arrivals disposed of in the orthodox way, and the process repeated two or three times, there is suddenly a movement among the officers as they busy themselves in collecting from the different boxes all the letters that have been received from first to last for the bags about to be despatched at the approaching town--the first junction station. The letters in question are examined to test the correctness of the sorting, then tied up in bundles in a sharp and decisive way, then placed away carefully in the several bags, which are tied, sealed, and ready for delivery just as the train is brought to a stand. Here they are given out; fresh supplies are received from a number of large towns in the immediate district, and the train is again on its way. The bags received are at once opened; the same round of sorting, collecting, examining, is gone through; the same process of despatching for the next and all subsequent postal stages is repeated, just as we have described. Little variation is noticed, except that at certain points a much larger number of bags are thrown into the office--for instance, as the train nears the more thickly populated parts of the midland counties, then the "black country," as it is called, and subsequently the manufacturing districts. At one of these points a considerable addition