Shortly before sunrise, the men who had been left in the camp on the Assunpink to feed the fires and make a noise beat a hasty retreat, and found their way to Princeton by circuitous paths. When Cornwallis got up, he could hardly believe his eyes. Here was nothing before him but an empty camp: the American army had vanished, and whither it had gone he could not imagine. But his perplexity was soon relieved by the booming of distant cannon on the Princeton road, and the game which the "old fox" had played him all at once became apparent. Nothing was to be done but to retreat upon New Brunswick with all possible haste, and save the stores there. His road led back through Princeton, and from Mawhood's fugitives he soon heard the story of the morning's disaster. His march was hindered by various impediments. A thaw had set in, so that the little streams had swelled into roaring torrents, difficult to ford, and the American army, which had passed over the road before daybreak, had not forgotten to destroy the bridges. By the time that Cornwallis and his men reached Princeton, wet and weary, the Americans had already left it, but they had not gone on to New Brunswick. Washington had hoped to seize the stores there, but the distance was eighteen miles, his men were wretchedly shod and too tired to march rapidly, and it would not be prudent to risk a general engagement when his main purpose could be secured without one. For these reasons, Washington turned northward to the heights of Morristown, while Cornwallis continued his retreat to New Brunswick. A few days later, Putnam advanced from Philadelphia and occupied Princeton, thus forming the right wing of the American army, of which the main body lay at Morristown, while Heath's division on the Hudson constituted the left wing. Various cantonments were established along this long line. On the 5th, George Clinton, coming down from Peekskill, drove the British out of Hackensack and occupied it, while on the same day a detachment of German mercenaries at Springfield was routed by a body of militia. Elizabethtown was then taken by General Maxwell, whereupon the British retired from Newark. [Sidenote: The tables completely turned] Thus in a brief campaign of three weeks Washington had rallied the fragments of a defeated and broken army, fought two successful battles, taken nearly 2,000 prisoners, and recovered the state of New Jersey. He had cancelled the disastrous effects of Lee's treachery, and replaced things apparently in the condition in which the fall of Fort Washington had left them. Really he had done much more than this, for by assuming the offensive and winning victories through sheer force of genius, he had completely turned the tide of popular feeling. The British generals began to be afraid of him, while on the other hand his army began to grow by the accession of fresh recruits. In New Jersey, the enemy retained nothing but New Brunswick, Amboy, and Paulus Hook.