those alone, without which the power given would be nugatory, would have been to deprive the legislature of the capacity to avail itself of experience, to exercise its reason, and to accommodate its legislation to circumstances. If we apply this principle of construction to any of the powers of the government, we shall find it so pernicious in its operation, that we shall be compelled to discard it. The powers vested in congress may certainly be carried into execution, without prescribing an oath of office. The power to exact this security for the faithful performance of duty is not given, nor is it indispensably necessary. The different departments may be established; taxes may be imposed and collected; armies and navies may be raised and maintained; and money may be borrowed, without requiring an oath of office. It might be argued, with as much plausibility, as other incidental powers have been assailed, that the convention was not unmindful of this subject. The oath, which might be exacted—that of fidelity to the constitution—is prescribed, and no other can be required. Yet, he would be charged with insanity, who should contend, that the legislature might not superadd, to the oath directed by the constitution, such other oath of office, as its wisdom might suggest.
"So, with respect to the whole penal code of the United States: whence arises the power to punish, in cases not prescribed by the constitution? All admit, that the government may legitimately, punish any violation of its laws; and yet, this is not among the enumerated powers of congress. The right to enforce the observance of law, by punishing its infraction, might be denied with the more plausibility, because it is expressly given in some cases. Congress is empowered 'to provide for, the punishment of counterfeiting the securities and current coin of the United States,' and 'to define and punish piracies and felonies committed on the high seas, and offences against the law of nations.' The several powers of congress may exist, in a very imperfect state to be sure, but they may exist, and be carried into execution, although no punishment should be inflicted in cases, where the right to punish is not expressly given.
"Take, for example, the power 'to establish post offices and post roads.' This power is executed by the single act of making the establishment. But, from this has been inferred the power, and duty of carrying the mail along the post road, from one post office to another. And, from this implied power has again been inferred the right to punish those, who steal letters from the post office, or rob the mail. It may be
