Summary

Horace Gray The Panama — Opinion of the Court

Armament for war is of a purely offensive nature. It is established when there is no other object in the armament than that of attack, or, at least, when everything shows that such is the principal object of the enterprise; then a vessel is deemed enemy or pirate, if she has no commission or papers sufficient to remove all suspicion. But defense is a natural right, and means of defense are lawful in voyages at sea, as in all other dangerous occupations of life. A ship which had but a small crew, and a considerable cargo, was evidently intended for commerce, and not for war.
Source: Wikisource

Horace Gray The Panama — Opinion of the Court

Nor can the authority to do so, in time of war, be affected by the facts that before the war a collector of customs had granted a clearance, and a postmaster had put mails on board, for a port which was not then, but has since become, enemy's country. Moreover, at the time of the capture of the Panama, this proclamation had not been issued. Without an express order of the government, a merchant vessel is not privileged from search or seizure by the fact that it has a government mail on board.
Source: Wikisource

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