The English post-office has far better opportunities of rendering its system more perfect than it is, from the fact that its clerks are not discharged on every change made in the heads of the department by the government. They are fixtures. But in this country no one engaged in a public office under one administration can calculate being continued under another. A clerk in the post-office, being appointed for an especial duty, troubles himself very little about that of any other. He takes no interest in the general business or details of the office, from the fact _that his situation is not a permanent one_: hence it is that few postmasters are enabled, within four years, to bring the office out of the chaos into which a previous administration had reduced it, so as to congratulate himself upon making one step towards perfection. He has to study the political elements outside first, and by the time these are reconciled, nearly one-third of his term has expired. In another portion of this work we have alluded to this political clog placed against the wheels of the postal department, and retarding, if not materially impairing, its social, moral, and financial interests. _LETTER-CARRIERS._ Letter-carriers are a very important class of men,—important, we mean, in their connection with the postal department. We speak of them here because their duties are not generally known to the public, nor their services properly appreciated or rewarded by the department. They are the “walking posts,” and carry with them daily thousands of dollars, which rarely are lost on their way to the recipients. The instances are so few of dishonest carriers that we have often been surprised that the fact has not been recorded ere this, so as it might be placed in juxtaposition with those _élite_ rogues in office who are daily robbing the government of millions. Is it because they are generally faithful? or is it because the position of a letter-carrier is one that requires no consideration from the department beyond the annual—rather limited—stipend for their services? The letter-carriers of our country represent a political class: they come forth from their respective wards under, as it were, leading politicians. The postmaster, in fact, has scarcely a voice in making these appointments. We have no objection to this system, as it is one peculiarly allied to the institutions of our country and mode of election; but we do object to good and honest men being discharged simply from the fact that a few politicians outside of an office want to get their particular friends in. This can scarcely be called rotation in office, as it frequently assumes an unjust, if not an intolerant, exercise of power. We have alluded to the English post-office as being perhaps the best-ordered and best-conducted in the world, _for there changes are not made_.