Such are the legislative powers of Congress, which are to be exercised within the States themselves;--and it is at once obvious, that they constitute a government of limited authority. The question arises, then, whether that authority is anywhere full and complete, embracing all the powers of government and extending to all the objects of which it can take cognizance. It has already been seen, that, when provision was made for the future acquisition of a seat of government, exclusive legislation over the district that might be acquired for that purpose was conferred upon Congress.[269] In the same clause, the like authority was given over all places that might be purchased, with the consent of any State legislature, for the erection of forts, magazines, arsenals, dock-yards, and other needful buildings.[270] All the other places to which the authority of the United States can extend are included under the term "territories," which are out of the limits and jurisdiction of any State. As this is a subject which is intimately connected with the power to admit new States into the Union, we are now to consider the origin and history of the authority given to Congress for that purpose. In examining the powers of Congress contained in the first article of the Constitution, the reader will not find any power to admit new States into the Union; and while he will find there the full legislative authority to govern the District of Columbia and certain other places ceded to the United States for particular purposes, of which I have already spoken, he will find no such authority there conferred in relation to the territory which had become the property of the United States by the cession of certain of the States before and after the adoption of the Articles of Confederation. If this power of legislation exists as to the territories, it is to be looked for in another connection; and although it is not the special province of this work to discuss questions of construction, it is proper here to state the history of those portions of the Constitution which relate to this branch of the authority of Congress. In the first volume of this work, I have given an account of the origin of the Northwestern Territory, of its relations to the Union, and of the mode in which the federal Congress had dealt with it down to the time when the national Convention was assembled.[271] From the sources there referred to, and from others to which reference will now be made, it may be convenient to recapitulate what had been done or attempted by the Congress of the Confederation.