In order to prevent the British from capturing Philadelphia, Washington put his army between them and that city. The British began to move upon him. Needing every soldier that he could get, he sent orders to General Lee to join him. Lee refused to move. Again and again Washington urged Lee to come to his aid. Each time Lee disobeyed. We now know that he was a traitor, secretly hoping that Washington might fail in order that he himself, who was second in command, might become Commander-in-Chief of the American army. Lee's disobedience placed Washington in a critical position. In order to save his army from capture, Washington had to retreat once more, this time across New Jersey toward Philadelphia. As the British army, in every way superior to Washington's, was close upon the Americans, it was a race for life. Sometimes the rear-guard of the Americans was just leaving a burning bridge when the van of the British army could be seen approaching. But by burning bridges and destroying food supplies intended for the British, Washington so delayed them that they were nineteen days in marching about sixty miles. Nevertheless the situation for the Americans was still desperate. To make matters worse, Washington saw his army gradually melting away by desertion. When he reached the Delaware River it numbered barely 3,000 men. [Illustration: WASHINGTON'S RETREAT THROUGH NEW JERSEY.] Having collected boats for seventy miles along the Delaware, Washington succeeded in safely crossing it a little above Trenton, on December 8th. As the British had no boats, they were obliged to wait until the river should freeze, when they intended to cross in triumph and make an easy capture of Philadelphia. To most people, in England and in America alike, the early downfall of the American cause seemed certain. General Cornwallis--who in May of this year had joined the British army in America--was so sure that the war would soon come to an end, that he had already packed some of his luggage and sent it aboard ship, with the intention of returning to England at an early day. But Washington had no thought of giving up the struggle. Far from being disheartened, he confronted the gloomy outlook with all his energy and courage. Fearless and full of faith in the patriot cause, he watched with vigilance for an opportunity to turn suddenly upon his over-confident enemy and strike a heavy blow. [Illustration: Map Illustrating the Struggle for the Hudson River and the Middle States.]