The instant the train stops, a portion of the mail, large or small as the case may be, is delivered into a wagon for rapid transfer to a railway post-office train about to start from another station. If the incoming train is late, it may be necessary to exact the utmost speed to reach the outgoing train, and in many cases it is always necessary to effect it rapidly. After the transfer mail is disposed of, the labels of the remaining pouches and sacks are examined, and as the mail is passed out of the car we are surprised at its quantity, filling a number of large wagons; this, however, does not constitute the entire mail distributed _en route_, as the quantities delivered at junctions and stations aggregate, in many cases, more by far than that delivered at the terminal station, There are many details of work that our space forbids us to describe, that are technical and of little interest to the reader, but are of relative importance. These we must leave, and prepare for the return journey on the night-train, feeling grateful that our busy fellow-travelers are to have an opportunity to refresh themselves. The work performed in a railway post-office on a night-train differs somewhat from that on a day-train, yet maintaining the same general principle of distribution. The methods differ, governed by the connections, and a clerk suddenly transferred from a day-train to a night-train on the same route, unless thoroughly informed of the train schedules, of close and remote connections, the time of the dispatch of direct closed pouches from many post-offices, stage route schedules, etc.,--which knowledge, even approximating correctness, would be extraordinary,--would be almost as much at a loss as if transferred to another route, excepting his knowledge of the location of the post-offices on his own line. In all cases if a delay occurs, causing a connection to be missed, it is the duty of the clerk to know at once the next most expeditious route by which the mail can be forwarded.