To avoid misapprehension on this important and difficult subject, I will state, distinctly, the conclusions at which I have arrived. They are: _First._ The rules of international law respecting the emancipation of slaves, by the rightful operation of the laws of another State or country upon the _status_ of the slave, while resident in such foreign State or country, are part of the common law of Missouri, and have not been abrogated by any statute law of that State. _Second._ The laws of the United States, constitutionally enacted, which operated directly on and changed the _status_ of a slave coming into the Territory of Wisconsin with his master, who went thither to reside for an indefinite length of time, in the performance of his duties as an officer of the United States, had a rightful operation on the _status_ of the slave, and it is in conformity with the rules of international law that this change of _status_ should be recognised everywhere. _Third._ The laws of the United States, in operation in the Territory of Wisconsin at the time of the plaintiff's residence there, did act directly on the _status_ of the plaintiff, and change his _status_ to that of a free man. _Fourth._ The plaintiff and his wife were capable of contracting, and, with the consent of Dr. Emerson, did contract a marriage in that Territory, valid under its laws; and the validity of this marriage cannot be questioned in Missouri, save by showing that it was in fraud of the laws of that State, or of some right derived from them; which cannot be shown in this case, because the master consented to it. _Fifth._ That the consent of the master that his slave, residing in a country which does not tolerate slavery, may enter into a lawful contract of marriage, attended with the civil rights and duties which belong to that condition, is an effectual act of emancipation. And the law does not enable Dr. Emerson, or any one claiming under him, to assert a title to the married persons as slaves, and thus destroy the obligation of the contract of marriage, and bastardize their issue, and reduce them to slavery.