A more formidable expedition, and still greater success soon followed. Early in November, Captain Du-Pont assembled a fleet of fifty sail, including transports, before Port Royal Sound. Forming a column of nine war-ships with a total of one hundred and twelve guns, the line steamed by the mid-channel between Fort Beauregard to the right, and Fort Walker to the left, the first of twenty and the second of twenty-three guns, each ship delivering its fire as it passed the forts. Turning at the proper point, they again gave broadside after broadside while steaming out, and so repeated their circular movement. The battle was decided when, on the third round, the forts failed to respond to the fire of the ships. When Commander Rodgers carried and planted the Stars and Stripes on the ramparts, he found them utterly deserted, everything having been abandoned by the flying garrisons. Further reconnaissance proved that the panic extended itself over the whole network of sea islands between Charleston and Savannah, permitting the immediate occupation of the entire region, and affording a military base for both the navy and the army of incalculable advantage in the further reduction of the coast. Another naval exploit, however, almost at the same time, absorbed greater public attention, and for a while created an intense degree of excitement and suspense. Ex-Senators J.M. Mason and John Slidell, having been accredited by the Confederate government as envoys to European courts, had managed to elude the blockade and reach Havana. Captain Charles Wilkes, commanding the _San Jacinto_, learning that they were to take passage for England on the British mail steamer _Trent_, intercepted that vessel on November 8 near the coast of Cuba, took the rebel emissaries prisoner by the usual show of force, and brought them to the United States, but allowed the _Trent_ to proceed on her voyage. The incident and alleged insult produced as great excitement in England as in the United States, and the British government began instant and significant preparations for war for what it hastily assumed to be a violation of international law and an outrage on the British flag. Instructions were sent to Lord Lyons, the British minister at Washington, to demand the release of the prisoners and a suitable apology; and, if this demand were not complied with within a single week, to close his legation and return to England.