“The policy in question, was effected on the 27th of June, 1807, on goods, the property of the plaintiff, an American citizen, on board the Little William, belonging to Jacob Sperry, also an American citizen, at and from Philadelphia to Tonningen, or Hamburg, if not blockaded; warranted American property, proof whereof to be made here. She sailed on the voyage insured, on the 3d of July 1807. On the 30th of June, the owner of the vessel, who was also the agent of the plaintiff, wrote a letter of instructions to his captain, in which he directs him ‘to proceed to Tonningen, and on arrival, to forward, by express, his letters to Mr. Vogell of Hamburg, to whom (he says) you are consigned, and under whose care you will place yourself. If you can ascertain and obtain permission to go to Hamburg from the cruising vessels at the entrance of the Eyder, you will proceed; but on no account attempt it, unless you are well assured that the blockade of the Elbe is raised.’”