The learned counsel who have preceded me have so fully and ably argued the political questions involved, that it would be the work of supererogation for me to go over them; but in this connection it is not inappropriate to refer to the fact that political opinions instilled into the minds of the prisoners may have influenced their conduct. They were indoctrinated with the principles of political leaders who advocated States' Rights, Nullification, and Secession; and without undertaking to justify or approve the soundness or correctness of their views, it is enough for me to show that the prisoners at the bar were actuated by these principles. The name of John C. Calhoun was _once_ dear to every American; his fame is now sectional. Every Southerner believes implicitly in his doctrines; his very name causes their bosoms to swell with emotions of pride; his works are political text books in the schools. It has been facetiously said that when Mr. Calhoun took a pinch of snuff, the whole State of South Carolina sneezed. I do not mean to treat this case with levity, but merely intend to show the sympathy that existed between Mr. Calhoun and his constituents. Then what is the "_head and front of their offending_"? They conscientiously believed that _allegiance_ was due to their State, and she in return owed them protection; and under such convictions enlisted in her behalf. If they have erred, it was from mistaken or false notions of patriotism, and not from criminality. It is the _intent_ that constitutes the crime. And this is the only just rule that should obtain in _human_ as well as _divine_ tribunals. The prisoners at the bar stand charged with the offence of piracy. I contend that they do not come within the intention and purview of the statute against piracy. To understand and properly interpret a law, we must look to the intention of the legislator, and the motives and causes which give rise to the enactment of the law. In the construction of a will, the intention of the testator is to be ascertained; and the same rules apply in the just interpretation of every law. These laws were enacted at a period when peace and prosperity smiled upon this country. If they had been passed during Nullification in 1832, when the disruption of the Union was threatened, then we might reasonably infer that they were intended to apply to the existing state of affairs; so that the irresistible conclusion is, that they were applicable only to a state of peace, and not to a state of war. The question then arises, Does a state of war exist? The learned counsel for the prosecution (Mr. Evarts), in an able and elaborate argument for the Government, when this question arose in the trial of prize causes, in the other part of this Court (when it was the interest of the Government to assume that position), demonstrated clearly, to my mind, that a state of war did exist, and confirmed his views by citations from the best authorities on international law.