Now there are certain features or symptoms, so to speak, in cases of mail depredations which go far to assist one accustomed to their investigation in determining whether they have occurred in large or small post-offices, and to distinguish with tolerable accuracy, between city and country embezzlements. A city depredator seldom if ever confines his operations to letters passing over a particular route. Indeed he could scarcely do so were he to attempt it, for in the usual division of labor, a dozen letters arriving on separate days would be likely to be taken charge of by as many different hands, and if letters were passing each way on the same route, it would be still more difficult for the same person to purloin from both, as the receiving and forwarding departments are generally if not always entirely distinct. Neither is it a city symptom to reseal and replace a letter after it has been rifled, for the reason, among others, that the depredator is not willing, after having succeeded in purloining it, to incur the additional risk of smuggling it back again. While in country or village post-offices, the thefts must in most cases be confined to one route, and there is more leisure and better opportunity for the resealing and returning process. For similar reasons, the loss or robbery of a number of letters addressed to the same party or business firm, although arriving by different routes, would not necessarily place a city post-office clerk under suspicion, since he could scarcely have a motive for such a selection among the thousands of valuable letters coming into his custody. On the contrary, if he were disposed to be dishonest, he would be more likely to take A.'s letter to-day, B.'s to-morrow, and C.'s the next day. Neither would it, in the case just supposed, be probable that there was a rogue on each of the different routes. The theory which experience and observation have established, would be that the repeated embezzlements had been carried on by some dishonest messenger outside the office who had in his power only the correspondence with which he had been intrusted. At all events, such a conclusion would be fully justified by the very frequent discoveries of similar delinquencies in our cities and large towns. The peculiar features in the present case showed quite plainly that neither the New York nor Ogdensburg offices were implicated, and that the depredations had occurred somewhere between the latter and the mailing office.