In examining the right of the General Government to adopt and execute under this grant a system of internal improvement the sole question to be decided is whether the power has been granted under any of the other grants. If it has, this power is applicable to it to the extent stated. If it has not, it does not exist at all, for it has not been hereby granted. I have already examined all the other grants (one only excepted, which will next claim attention) and shown, as I presume, on the most liberal construction of their powers that the right has not been granted by any of them; hence it follows that in regard to them it has not been granted by this. I come now to the last source from which this power is said to be derived, viz, the power to dispose of and make all needful rules and regulations respecting the territory or other property of the United States, which is contained in the second clause of the third section of the fourth article of the Constitution. To form a just opinion of the nature and extent of this power it will be necessary to bring into view the provisions contained in the first clause of the section of the article referred to, which makes an essential part of the policy in question. By this it is declared that new States shall be admitted into the Union, but that no new States shall be formed or erected within the jurisdiction of any other State, nor any States 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 United States.