There now remain to be considered the restraints imposed upon the exercise of the powers of Congress, both within the States and in all other places; both where the authority of the United States is limited to certain special objects, and where it is unlimited and universal, excepting so far as it is narrowed by these constitutional restraints. Some of them I have already described, in tracing the manner in which they were introduced into the Constitution. We have seen how far the commercial and revenue powers became limited in respect to the slave-trade, to taxes on exports, to preferences between the ports of different States, and to the levying of capitation or other direct taxes. These restrictions were applicable to these special powers. But others were introduced, which apply to the exercise of all the powers of Congress, and are in the nature of limitations upon its general authority as a government.

One of these is embraced in the provision, "that the privilege of the writ of habeas corpus shall not be suspended, unless when, in cases of rebellion or invasion, the public safety may require it." The common law of England, which recognizes the right to the writ of habeas corpus for the purpose of deliv

States, whether by States of the Union or by foreign States, and that it clothes the government with a full legislative power over such territories and their inhabitants, which is subject only to the particular restrictions enumerated in the Constitution, or provided for in the cessions. Perhaps it is needless for me to add

that I entertain this opinion. But it is rejected by others, and, in the present state of judicial interpretation of this part of the Constitution, by the supreme tribunal, it is not easy to determine what will finally become the settled construction.

1 Constitution, Art. I. § 9, cl. 2.

ery from illegal imprisonment or restraint, was the law of each of the American States; and it appears from the proceedings of the Convention to have been the purpose of this provision to recognize this right, in the relations of the people of the States to the general government, and to secure and regulate it. The choice lay between a declaration of the existence of the right, making it inviolable and absolute, under all circumstances, and a recognition of its existence by a provision which would admit of its being suspended in certain emergencies. The latter course was adopted, although three of the States recorded their votes against the exception of cases of rebellion or invasion.1

The prohibition upon Congress to pass bills of attainder, or ex post facto laws, came into the Constitution at a late period, and while the first draft of it was under consideration. Bills of attainder, in the jurisprudence of the common law, are acts of legislation inflicting punishment without a judicial trial. The proposal to prohibit them was received in the Convention with unanimous assent. With regard to the other class of legislative acts, described as "ex post facto laws," there was some difference of opinion, in consequence probably of different views of the extent of the term. In the common law, this expression included only, then and since, laws which punish as crimes acts which were not punishable as crimes when they were committed. Laws of a civil nature,

1 See Elliot, V. 484. The three States were North Carolina, South Carolina, and Georgia.

retrospective in their operation upon the civil rights and relations of parties, were not embraced by this term, according to the definition of English jurists. But it is manifest from what was said by different members, that, at the time when the vote was taken which introduced this clause into the Constitution, the expression "ex post facto laws" was taken in its widest sense, embracing all laws retrospective in their operation. It was objected, therefore, that the prohibition was unnecessary, since, upon the first principles of legislation, such laws are void of themselves, without any constitutional declaration that they are SO. But experience had proved that, whatever might be the principles of civilians respecting such laws, the State legislatures had passed them, and they had been acted on. A large majority of the Convention determined, therefore, to place this restraint upon the national legislature, and at the time of the vote I think it evident that all retrospective laws, civil as well as criminal, were understood to be included.1 But when the same restraint came afterwards to be imposed upon the State legislatures, the attention of the assembly was drawn to the distinction between criminal laws and laws relating to civil interests. In order to reach and control retrospective laws operating upon the civil rights of parties, when passed by a State, a special description was employed to designate them, as “laws impairing the obligation of contracts," and the term "ex post facto laws" was thus confined to laws creating and punishing criminal offences after

the acts had been committed.' What is now the settled construction of this term, therefore, is in accordance with the sense in which it was finally intended to be used by the framers of the Constitution before the instrument passed from their hands.

The committee of detail had reported in their draft of the Constitution a clause which restrained the United States from granting any title of nobility. The Convention, for the purpose of preserving all officers of the United States independent of external influence, added to this a provision that no person holding an office of profit or trust under the United States shall, without the consent of Congress, accept of any present, emolument, office, or title, of any kind whatever, from any king, prince, or foreign state.2

In addition to the special powers conferred by the Constitution upon the national government, it has imposed certain restraints on the political power of the States, which qualify and diminish what would otherwise be the unlimited sovereignty of each of them. These restraints are of two classes; — a part of them being designed to remove all obstructions that might be placed by State legislation or action in the way of the appropriate exercise of the powers vested in the United States, and a part of them being intended to assimilate the nature of the State governments to that of the Union, by the application of certain maxims or rules of public policy. These restraints may now be briefly examined, with reference to this classification.

1 Elliot, V. 488.

2 Ibid. 467. Constitution, Art. I. § 9, cl. 8.

The idea of imposing special restrictions upon the power of the separate States was not expressly embraced in the plan of government described by the resolutions on which the committee of detail were instructed to prepare the instrument of the instrument of government. Such restrictions, however, were not unknown to the previous theory of the Union. They existed in the Articles of Confederation, where they had been introduced with the same general purpose of withdrawing from the action of the States those objects, which, by the stipulations of that instrument, had been committed to the authority of the United States in Congress. But the inefficacy of those provisions lay in the fact, that they were the mere provisions of a theory. The step now proposed to be taken was to superadd to the prohibitions themselves the principle of their supremacy as matters of fundamental law, and to enable the national judiciary to make that supremacy effectual.

Almost all the restraints imposed by the Articles of Confederation upon the States could be removed or relaxed by the consent of the Congress to the doing of what was otherwise prohibited. In the first draught of the Constitution, the committee of detail inserted four absolute prohibitions, which could not be removed by Congress itself. These related to the coining of money, the granting of letters of marque and reprisal, the making of treaties, alliances, and confederations, and the granting of titles of nobility. All the other restraints on the States were to be operative or inoperative, according to