The African slave trade had been carried on, under the unbounded protection of the Crown, for near two centuries, when the case of Somersett was heard, and no motion for its suppression had ever been submitted to Parliament; while it was forced upon and maintained in unwilling colonies by the Parliament and Crown of England at that moment. Fifteen thousand negro slaves were then living in that island, where they had been introduced under the counsel of the most illustrious jurists of the realm, and such slaves had been publicly sold for near a century in the markets of London. In the northern part of the kingdom of Great Britain there existed a class of from 30,000 to 40,000 persons, of whom the Parliament said, in 1775, (15 George III, chap. 28,) "many colliers, coal-heavers, and salters, are in a state of slavery or bondage, bound to the collieries and salt works, where they work for life, transferable with the collieries and salt works when their original masters have no use for them; and whereas the emancipating or setting free the colliers, coal-heavers, and salters, in Scotland, who are now in a state of servitude, gradually and upon reasonable conditions, would be the means of increasing the number of colliers, coal-heavers, and salters, to the great benefit of the public, without doing any injury to the present masters, and would remove the reproach of allowing such a state of servitude to exist in a free country," &c.; and again, in 1799, "they declare that many colliers and coal-heavers still continue in a state of bondage." No statute, from the Conquest till the 15 George III, had been passed upon the subject of personal slavery. These facts have led the most eminent civilian of England to question the accuracy of this judgment, and to insinuate that in this judgment the offence of ampliare jurisdictionem by private authority was committed by the eminent magistrate who pronounced it.
This sentence is distinguishable from those cited from the French courts in this: that there positive prohibitions existed against slavery, and the right to freedom was conferred on the immigrant slave by positive law; whereas here the consequences of slavery merely—that is, the public policy—were found to be contrary to the law of slavery. The case of the slave Grace, (2 Hagg.,) with four others, came before Lord Stowell in 1827, by appeals from the West India vice admiralty courts. They were cases of slaves who had returned to those islands, after a residence in Great Britain, and where the claim to freedom was first presented in the colonial forum. The learned judge in that case said: "This suit fails in its foundation. She (Grace) was not a free person; no injury is done her by her continuance in slavery, and she has no pretensions to any other station than that which was enjoyed by every slave of a family. If she depends upon such freedom conveyed by a mere residence in England, she complains of a violation of right which she possessed no longer than whilst she resided in England, but which totally expired when that residence ceased, and she was imported into Antigua."
The decision of Lord Mansfield was, "that so high an act of dominion" as the master exercises over his slave, in sending him abroad for sale, could not be exercised in England under the American laws, and contrary to the spirit of their own.
The decision of Lord Stowell is, that the authority of the English laws terminated when the slave departed from England. That the laws of England were not imported into Antigua, with the slave, upon her return, and that the colonial forum had no warrant for applying a foreign code to dissolve relations which had existed between persons belonging to that island, and which were legal according to its own system. There is no distinguishable difference between the case before us and that determined in the admiralty of Great Britain.
The complaint here, in my opinion, amounts to this: that the judicial tribunals of Missouri have not denounced as odious the Constitution and laws under which they are organized, and have not superseded them on their own private authority, for the purpose of applying the laws of Illinois, or those passed by Congress for Minnesota, in their stead. The eighth section of the act of Congress of the 6th of March, 1820, (3 Statutes at Large, 545,) entitled, "An act to authorize the people of Missouri to form a State Government," &c., &c., is referred to, as affording the authority to this court to pronounce the sentence which the Supreme Court of Missouri felt themselves constrained to refuse. That section of the act prohibits slavery in the district of country west of the Mississippi, north of thirty-six degrees thirty minutes north latitude, which belonged to the ancient province of Louisiana, not included in Missouri.
It is a settled doctrine of this court, that the Federal Government can exercise no power over the subject of slavery within the States, nor control the intermigration of slaves, other than fugitives, among the States. Nor can that Government affect the duration of slavery within the States, other than by a legislation over the foreign slave trade. The power of Congress to adopt the section of the act above cited must therefore depend upon some condition of the Territories which distinguishes them from States, and subjects them to a control more extended. The third section of the fourth article of the Constitution is referred to as the only and all-sufficient grant to support this claim. It is, that "new States may be admitted by the Congress to this Union; but no new State shall be formed or erected within the jurisdiction of any other State, nor any State be formed by the junction of two or more States, or parts of States, without the consent of the Legislatures of the States concerned, as well as of the Congress. The Congress shall have power to dispose of and make all needful rules and regulations respecting the territory or other property belonging to the United States; and nothing in this Constitution shall be so construed as to prejudice any claims of the United States, or of any particular State."
It is conceded, in the decisions of this court, that Congress may secure the rights of the United States in the public domain, provide for the sale or lease of any part of it, and establish the validity of the titles of the purchasers, and may organize Territorial Governments, with powers of legislation. (3 How., 212; 12 How., 1; 1 Pet., 511; 13 P., 436; 16 H., 164.)
But the recognition of a plenary power in Congress to dispose of the public domain, or to organize a Government over it, does not imply a corresponding authority to determine the internal polity, or to adjust the domestic relations, or the persons who may lawfully inhabit the territory in which it is situated. A supreme power to make needful rules respecting the public domain, and a similar power of framing laws to operate upon persons and things within the territorial limits where it lies, are distinguished by broad lines of demarcation in American history. This court has assisted us to define them. In Johnson v. McIntosh, (8 Wheat., 595—543,) they say: "According to the theory of the British Constitution, all vacant lands are vested in the Crown; and the exclusive power to grant them is admitted to reside in the Crown, as a branch of the royal prerogative.
"All the lands we hold were originally granted by the Crown, and the establishment of a royal Government has never been considered as impairing its right to grant lands within the chartered limits of such colony."
And the British Parliament did claim a supremacy of legislation coextensive with the absoluteness of the dominion of the sovereign over the Crown lands. The American doctrine, to the contrary, is embodied in two brief resolutions of the people of Pennsylvania, in 1774: 1st. "That the inhabitants of these colonies are entitled to the same rights and liberties, within the colonies, that the subjects born in England are entitled within the realm." 2d. "That the power assumed by Parliament to bind the people of these colonies by statutes, in all cases whatever, is unconstitutional, and therefore the source of these unhappy difficulties." The Congress of 1774, in their statement of rights and grievances, affirm "a free and exclusive power of legislation" in their several Provincial Legislatures, "in all cases of taxation and internal polity, subject only to the negative of their sovereign, in such manner as has been heretofore used and accustomed." (1 Jour. Cong., 32.)