Now, if your honors please, it will probably be attempted to be answered to the argument, that by section 10 of article 1 of the Constitution of the Union, the States are forbidden to enter into any treaty, alliance, or confederation, or to grant letters of marque and reprisal; or, without the consent of Congress, to enter into any agreement or compact with another State; or to engage in war, unless actually invaded, or in such imminent danger as will not admit of delay. This does not conflict with, but, on the contrary, confirms, the views I have presented, for the following reasons: The prohibition against entering into any treaty, alliance, or confederation, and against granting letters of marque and reprisal, has clearly no reference whatever to the relations which the States of the Union sustain to each other. It refers solely to their relations towards foreign powers. I beg to cite, upon that subject, from Grotius, Lib. 1, chap. 4, sec. 13. He says: "In the sixth place, when a King has only a part of the sovereignty, the rest being reserved to the people, or to a Senate, if he encroaches upon the jurisdiction which does not belong to him he may lawfully be opposed by force, since in that regard he is not at all sovereign. This is the case, in my opinion, even when in the distribution of the sovereign power the power of making war is assigned to the King. _For the grant of such a power must in that case be understood only in its relation to wars with foreign powers, those who possess a part of the sovereignty necessarily having at the same time the right of defending it_; and when a necessity arises of having recourse to forcible resistance against the King, he may, by right of war, lose even the part of the sovereignty which incontestibly belonged to him." I say, then, in the next place, that if any of the States, having come into collision with any of their sister States, or with the General Government, and being threatened with invasion or overthrow in the contest, resort to letters of marque as a means of weakening their adversary, and thereby preventing or retarding the threatened invasion, their right to do so is not at all affected or impaired by that provision of the Federal Constitution. The right of resistance includes it as well as every other means of rendering resistance effectual. So also with regard to the prohibition against entering into any treaty, alliance, or confederation, which is coupled with the prohibition against granting letters of marque in the first paragraph of the tenth section. That that prohibition is restricted to compacts or agreements with foreign powers, is manifest from the whole structure of the section.