According to these authorities, it seems reasonable to infer, that, under the Constitution of the United States, the pardoning power, which is clearly applicable to the offence of "transporting" slaves of the District, might remit the penalties in question. These penalties, though allotted to the owners and the county, when finally collected, are neither more nor less than the punishment, under sentence of a criminal court, for an offence of which the parties stand convicted upon indictment. They can be collected and acquitted only by the United States. No process for this purpose is at the command of the slave-owner. He had no control whatever over the prosecution at any stage, nor did it proceed at his suggestion or information. The very statute under which these public proceedings were instituted in the name of the United States secured to the slave-owner his private action on the case for damages,--thus separating the public from the private interests. These it seems the duty of the President to keep separate, except on the final collection and distribution of the penalties. Public policy and the ends of justice require that the punishment for a criminal offence should, in every case, be exclusively subject to the supreme pardoning power, without dependence upon the will of any private person. An obvious case will illustrate this. Suppose, in the case of Drayton and Sayres, it should be ascertained beyond doubt that the conviction was procured by perjury. If, by virtue of the judgment, the slave-owners have an interest in the imprisonment of these men which cannot be touched, then the prisoners, unable to meet these heavy liabilities, must continue in perpetual imprisonment, or owe their release to the accident of private good-will. The President, notwithstanding his beneficent power to pardon, under the Constitution, will be powerless to remedy this evil. But such a state of things would be monstrous; and any interpretation of the Constitution is monstrous which thus ties his hands. Mercy and justice would be rendered not merely _by halves_, but, owing to the inability of prisoners, from poverty, to pay the other half of the fine, they would be entirely arrested. The power of pardon, which is attached by the Constitution to offences generally, should not be curtailed. It is a generous prerogative, and should be exercised generously. _Boni judicis est ampliare jurisdictionem._ This is an old maxim of the law. But if it be the duty of a good judge to extend his jurisdiction, how much more is it the duty of a good President to extend the field of his clemency! At least, no small doubt should deter him from the exercise of his prerogative. * * * * * The conclusion from this review is as follows. 1. By the English Common Law the costs and one half of the fines may be remitted. It is not certain that by this law, as adopted in the United States, the other half of the fines may not also be remitted.