Captain Bailey was sent ashore to demand the surrender, and that the United States flag should be hoisted upon the public buildings. The rage and mortification of the excitable Creoles was openly manifested by insult and abuse, and the service was not unattended with danger. The troops, however, being withdrawn by the military commander, the mayor, with some natural grandiloquence, announced his submission to the inevitable, and Captain Bailey hoisted the flag on the mint. The next day it was hauled down by a party of four citizens; in consequence of which act, the flag-officer, on the 29th, sent ashore a battalion of 250 marines, accompanied by a howitzer battery in charge of two midshipmen, the whole under command of the fleet-captain. By them the flags were rehoisted and the buildings guarded, until General Butler arrived on the evening of May 1st, when the city was turned over to his care. Meanwhile Commander Porter remained in command below the forts. The morning after the passage of the fleet he sent a demand for their surrender, which was refused. Learning that the Louisiana and some other boats had escaped the general destruction, and not aware of their real condition, he began to take measures for the safety of his mortar-schooners. They were sent down the river to Pilot Town, with the Portsmouth as convoy, and with orders to fit for sea. Six were sent off at once to the rear of Fort Jackson, to blockade the bayous that ramify through that low land; while the Miami and Sachem were sent in the other direction, behind St. Philip, to assist the troops to land. On the 27th, Porter, having received official information of the fall of the city, notified Colonel Higgins of the fact, and again demanded the surrender, offering favorable conditions. Meanwhile insubordination was rife in the garrison, which found itself hemmed in on all sides. At midnight of the 27th, the troops rose, seized the guard and posterns, reversed the field pieces commanding the gates, and began to spike the guns. Many of them left the fort with their arms; and the rest, except one company of planters, firmly refused to fight any longer. The men were largely foreigners, and with little interest in the Secession cause; but they also probably saw that continued resistance and hardship could not result in ultimate success. The water-way above and below being in the hands of the hostile navy, all communication was cut off by the nature of the country and the state of the river; there could therefore be but one issue to a prolonged contest. The crime of the men was heinous, but it only hastened the end. To avoid a humiliating disaster, General Duncan accepted the offered terms on the 28th. The officers were permitted to retain their side arms, and the troops composing the garrison to depart, on parole not to serve till exchanged. At 2.30 P.M. the forts were formally delivered to the navy, and the United States flag once more hoisted over them.