As business stopped and wages grew scarce and scarcer, the fierce, dangerous part of the population which comes to the surface in times of siege began to gain more and more control of the city. For years there had been a secret society of criminals in New Orleans which had often controlled her city government. It was known as the "Thugs." Heretofore they had always worked in secret and underground. Now criminals who formerly would only come out at night and secretly, were seen on the streets in open day. As the Union lines closed around the city by sea and land, the crowds of men and women without money and without work became as fierce and bitter and dangerous as rats in a trap. For a while they told each other that the city could never be taken. Nothing afloat, they said again and again, can pass by the great chain and the sunken ships that block the river. If they could they would sink under the withering fire of Fort Jackson, a great star-shaped fort of stone and mortar, or Fort St. Phillip with its fifty-two guns which could be brought to bear on any vessel going up or down the river. Beyond the forts was a fleet of rams and gunboats and in a shipyard over at Jefferson, one of the suburbs of New Orleans, was building the great iron-clad _Mississippi_, which alone they felt would be equal to the whole blockading fleet. So thought and said the swarming unemployed thousands of New Orleans. Finally came a dreadful day when the tops of the naked masts of the hated Yankee fleet showed against the evening sky across one of the bends of the river. Then came the roar of distant guns for a day and a night as the Union vessels attacked the forts and concealed batteries. Still the people believed in their defenses although the firing came nearer and nearer. Not until they saw the city troops carry the cotton out of the cotton-presses down to the wharves to be burned in miles of twisting flame to save it from the Union Army did they realize how close was the day of the surrender of the city. Then all the empty ships which had been moored out in the river were fired and the warehouses of provisions still left were broken open. Mobs of desperate men and women surged back and forth fighting for the sugar and rice and molasses with which the wharves were covered. Suddenly around Slaughter House Point, silent, grim and terrible, came the black fleet which had safely run the gauntlet of forts, gunboats, batteries and torpedoes. For the first time since the war had begun, the Stars and Stripes floated again in sight of New Orleans. As the fleet came nearer and nearer, the crowds which blackened the wharves and levees of New Orleans shouted for the _Mississippi_.