The hardship incurred by a night-clerk is greater in many respects than that of the day-clerk; while in the latter case a continual active strain is required in the performance of local work and its multiplicity of detail, yet this is more than offset by the handling of bulky and heavy through mail and the unnatural necessity of sleeping in the daytime, which at most affords but a partial rest. On many night-lines the clerks commence work in mid-afternoon, accomplishing considerable before the train starts, and as the train plunges through darkness into the gray dawn and early morning, they sturdily empty pouches and sacks, and the incessant flow of letters and papers is only interrupted when approaching some important junction where mail is delivered and received from connecting lines or post-offices. Everything presents a weird aspect in a railway-station at midnight,--men flit about in a dazed way with satchels, the bright light bursting through the doorway of the car gives a ghastly look to the face of the man who throws in the pouches and sacks, and all appear like ghosts that will vanish with the approach of dawn; but we realize the substance of our surroundings when we again turn our attention to the busy scene in the car. The city distribution of letters--a feature of the service on night-trains which has greatly facilitated the early delivery of mails in a few of the larger cities--has been extended to other cities, and others are still to receive its benefit. For instance, clerks from the Boston post-office detailed to do this duty enter the mail-car at the Boston and Albany Railway at Springfield, Massachusetts, and sort the city letters by carriers' routes, post-office box sections, banks, insurance offices, etc. The corresponding train moving in the opposite direction is boarded by New York post-office clerks making similar separations. The packages of letters thus made up go direct to their respective divisions in the post-office, thereby avoiding the delay that would be caused in passing through other preliminary distributing departments. This work has been taken up recently by the Railway Mail Service, the plan enlarged and extended, and added to the other duties of the clerks. Additional clerks, however, have been employed to perform this work, yet the others are required to know it, and on lines where additional clerks were not appointed, to make it their regular duty.