Washington did not try to do more than check their advance, because he knew their ships could sail up the Hudson, across which he had vainly tried to make a barrier by sinking some old ships. Step by step, therefore, Washington withdrew until he came to White Plains. There a battle was fought; but, while the Americans were defeated, the British retreated on the next day, rather than renew the fight and lose more men. Washington had left General Nathanael Greene in charge of Fort Washington, telling him to forsake it rather than run any risk of losing his troops. But Greene thought it would be safe to remain there awhile longer. Unfortunately, however, a traitor gave General Howe the plans of the place, thus enabling him to surprise and capture Fort Washington, together with three thousand men. These soldiers, like many other American prisoners, were sent on board a rotting ship in New York harbor, where, in the course of the Revolutionary War, more than eleven thousand men died from bad food, bad water, and bad air. These victims of British cruelty were first buried in the mud at low tide, but their remains now rest in Washington Park, Brooklyn. A memorial monument has also been erected in their honor in Trinity Church, bearing the inscription: "To those great and good men who died while imprisoned in this city, for their devotion to the cause of American Independence." This honor was well deserved, for soldiers who die of disease or in captivity are just as likely to be heroes as those who fall on the battlefield. Washington, seeing his fort taken, now went to Hack´en-sack, sending orders to General Charles Lee to cross the Hudson and join him in New Jersey. But instead of obeying promptly, Lee delayed so long that, as you will soon see, he hampered Washington greatly. The British, in the meantime, crossed the river, and Greene was obliged to leave Fort Lee in hot haste. Indeed, the enemy were so near that they found the soup pots still boiling on the fire, and merrily ate the dinner which was to have been served for the Americans. Still faithful to his plan to worry and check the British, without meeting them in open battle, Washington now slowly retreated across New Jersey. We are told that he often left a place as the enemy came in; and because he thus imitated the tactics of a Roman general, you will often hear him called the "American Fā´bi-us." Corn-wal´lis, the British general now in charge, pursued the Americans as fast as he could, in order to force them to meet him in pitched battles. But while the armies were often close enough to hear the music of each other's bands, and there were many small skirmishes, no real battle took place.