On the night of the 29th of August there was clear moonlight, with fog towards daybreak. A British army of twenty-five thousand men was only some six hundred yards from the American lines. A few miles from the shore lay at anchor a great British fleet with, it is to be presumed, its patrols on the alert. Yet, during that night, ten thousand American troops were marched down to boats on the strand at Brooklyn and, with all their stores, were carried across a mile of water to New York. There must have been the splash of oars and the grating of keels, orders given in tones above a whisper, the complex sounds of moving bodies of men. It was all done under the eye of Washington. We can picture that tall figure moving about on the strand at Brooklyn, which he was the last to leave. Not a sound disturbed the slumbers of the British. An army in retreat does not easily defend itself. Boats from the British fleet might have brought panic to the Americans in the darkness and the British army should at least have known that they were gone. By seven in the morning the ten thousand American soldiers were for the time safe in New York, and we may suppose that the two Howes were asking eager questions and wondering how it had all happened. Washington had shown that he knew when and how to retire. Long Island was his first battle and he had lost. Now retreat was his first great tactical achievement. He could not stay in New York and so sent at once the chief part of the army, withdrawn from Brooklyn, to the line of the Harlem River at the north end of the island. He realized that his shore batteries could not keep the British fleet from sailing up both the East and the Hudson Rivers and from landing a force on Manhattan Island almost where it liked. Then the city of New York would be surrounded by a hostile fleet and a hostile army. The Howes could have performed this maneuver as soon as they had a favorable wind. There was, we know, great confusion in New York, and Washington tells us how his heart was torn by the distress of the inhabitants. The British gave him plenty of time to make plans, and for a reason. We have seen that Lord Howe was not only an admiral to make war but also an envoy to make peace. The British victory on Long Island might, he thought, make Congress more willing to negotiate. So now he sent to Philadelphia the captured American General Sullivan, with the request that some members of Congress might confer privately on the prospects for peace.