It is impossible for me to conceive on what ground France could have advanced a claim, or could have desired to advance a claim, to restrain the United States from making any rules and regulations respecting this territory, which the United States might think fit to make; and still less can I conceive of any reason which would have induced the United States to yield to such a claim. It was to be expected that France would desire to make the change of sovereignty and jurisdiction as little burdensome as possible to the then inhabitants of Louisiana, and might well exhibit even an anxious solicitude to protect their property and persons, and secure to them and their posterity their religious and political rights; and the United States, as a just Government, might readily accede to all proper stipulations respecting those who were about to have their allegiance transferred. But what interest France could have in uninhabited territory, which, in the language of the treaty, was to be transferred "forever, and in full sovereignty," to the United States, or how the United States could consent to allow a foreign nation to interfere in its purely internal affairs, in which that foreign nation had no concern whatever, is difficult for me to conjecture. In my judgment, this treaty contains nothing of the kind.

The third article is supposed to have a bearing on the question. It is as follows: "The inhabitants of the ceded territory shall be incorporated in the Union of the United States, and admitted as soon as possible, according to the principles of the Federal Constitution, to the enjoyment of all the rights, advantages, and immunities, of citizens of the United States; and in the mean time they shall be maintained and protected in the enjoyment of their liberty, property, and the religion they profess."

There are two views of this article, each of which, I think, decisively shows that it was not intended to restrain the Congress from excluding slavery from that part of the ceded territory then uninhabited. The first is, that, manifestly, its sole object was to protect individual rights of the then inhabitants of the territory. They are to be "maintained and protected in the free enjoyment of their liberty, property, and the religion they profess." But this article does not secure to them the right to go upon the public domain ceded by the treaty, either with or without their slaves. The right or power of doing this did not exist before or at the time the treaty was made. The French and Spanish Governments while they held the country, as well as the United States when they acquired it, always exercised the undoubted right of excluding inhabitants from the Indian country, and of determining when and on what conditions it should be opened to settlers. And a stipulation, that the then inhabitants of Louisiana should be protected in their property, can have no reference to their use of that property, where they had no right, under the treaty, to go with it, save at the will of the United States. If one who was an inhabitant of Louisiana at the time of the treaty had afterwards taken property then owned by him, consisting of fire-arms, ammunition, and spirits, and had gone into the Indian country north of thirty-six degrees thirty minutes, to sell them to the Indians, all must agree the third article of the treaty would not have protected him from indictment under the act of Congress of March 30, 1802, (2 Stat. at Large, 139,) adopted and extended to this territory by the act of March 26, 1804, (2 Stat. at Large, 283.)

Besides, whatever rights were secured were individual rights. If Congress should pass any law which violated such rights of any individual, and those rights were of such a character as not to be within the lawful control of Congress under the Constitution, that individual could complain, and the act of Congress, as to such rights of his, would be inoperative; but it would be valid and operative as to all other persons, whose individual rights did not come under the protection of the treaty. And inasmuch as it does not appear that any inhabitant of Louisiana, whose rights were secured by treaty, had been injured, it would be wholly inadmissible for this court to assume, first, that one or more such cases may have existed; and, second, that if any did exist, the entire law was void—not only as to those cases, if any, in which it could not rightfully operate, but as to all others, wholly unconnected with the treaty, in which such law could rightfully operate.

But it is quite unnecessary, in my opinion, to pursue this inquiry further, because it clearly appears from the language of the article, and it has been decided by this court, that the stipulation was temporary, and ceased to have any effect when the then inhabitants of the Territory of Louisiana, in whose behalf the stipulation was made, were incorporated into the Union.

In the cases of New Orleans v. De Armas et al., (9 Peters, 223,) the question was, whether a title to property, which existed at the date of the treaty, continued to be protected by the treaty after the State of Louisiana was admitted to the Union. The third article of the treaty was relied on. Mr. Chief Justice Marshall said: "This article obviously contemplates two objects. One, that Louisiana shall be admitted into the Union as soon as possible, on an equal footing with the other States; and the other, that, till such admission, the inhabitants of the ceded territory shall be protected in the free enjoyment of their liberty, property, and religion. Had any one of these rights been violated while these stipulations continued in force, the individual supposing himself to be injured might have brought his case into this court, under the twenty-fifth section of the judicial act. But this stipulation ceased to operate when Louisiana became a member of the Union, and its inhabitants were 'admitted to the enjoyment of all the rights, advantages, and immunities, of citizens of the United States.'"

The cases of Chouteau v. Marguerita, (12 Peters, 507,) and Permoli v. New Orleans, (3 How., 589,) are in conformity with this view of the treaty.

To convert this temporary stipulation of the treaty, in behalf of French subjects who then inhabited a small portion of Louisiana, into a permanent restriction upon the power of Congress to regulate territory then uninhabited, and to assert that it not only restrains Congress from affecting the rights of property of the then inhabitants, but enabled them and all other citizens of the United States to go into any part of the ceded territory with their slaves, and hold them there, is a construction of this treaty so opposed to its natural meaning, and so far beyond its subject-matter and the evident design of the parties, that I cannot assent to it. In my opinion, this treaty has no bearing on the present question.

For these reasons, I am of opinion that so much of the several acts of Congress as prohibited slavery and involuntary servitude within that part of the Territory of Wisconsin lying north of thirty-six degrees thirty minutes north latitude, and west of the river Mississippi, were constitutional and valid laws.

I have expressed my opinion, and the reasons therefor, at far greater length than I could have wished, upon the different questions on which I have found it necessary to pass, to arrive at a judgment on the case at bar. These questions are numerous, and the grave importance of some of them required me to exhibit fully the grounds of my opinion. I have touched no question which, in the view I have taken, it was not absolutely necessary for me to pass upon, to ascertain whether the judgment of the Circuit Court should stand or be reversed. I have avoided no question on which the validity of that judgment depends. To have done either more or less, would have been inconsistent with my views of my duty.