Is it conceivable that the Constitution has conferred the right on every citizen to become a resident on the territory of the United States with his slaves, and there to hold them as such, but has neither made nor provided for any municipal regulations which are essential to the existence of slavery? Is it not more rational to conclude that they who framed and adopted the Constitution were aware that persons held to service under the laws of a State are property only to the extent and under the conditions fixed by those laws; that they must cease to be available as property, when their owners voluntarily place them permanently within another jurisdiction, where no municipal laws on the subject of slavery exist; and that, being aware of these principles, and having said nothing to interfere with or displace them, or to compel Congress to legislate in any particular manner on the subject, and having empowered Congress to make all needful rules and regulations respecting the territory of the United States, it was their intention to leave to the discretion of Congress what regulations, if any, should be made concerning slavery therein? Moreover, if the right exists, what are its limits, and what are its conditions? If citizens of the United States have the right to take their slaves to a Territory, and hold them there as slaves, without regard to the laws of the Territory, I suppose this right is not to be restricted to the citizens of slaveholding States. A citizen of a State which does not tolerate slavery can hardly be denied the power of doing the same thing. And what law of slavery does either take with him to the Territory? If it be said to be those laws respecting slavery which existed in the particular State from which each slave last came, what an anomaly is this? Where else can we find, under the law of any civilized country, the power to introduce and permanently continue diverse systems of foreign municipal law, for holding persons in slavery? I say, not merely to introduce, but permanently to continue, these anomalies. For the offspring of the female must be governed by the foreign municipal laws to which the mother was subject; and when any slave is sold or passes by succession on the death of the owner, there must pass with him, by a species of subrogation, and as a kind of unknown _jus in re_, the foreign municipal laws which constituted, regulated, and preserved, the _status_ of the slave before his exportation. Whatever theoretical importance may be now supposed to belong to the maintenance of such a right, I feel a perfect conviction that it would, if ever tried, prove to be as impracticable in fact, as it is, in my judgment, monstrous in theory.