In the mean time, General Howe retired slowly down the North River. His designs were immediately penetrated by the American general, who perceived the necessity of passing a part of his army into Jersey, but was restrained from immediately leaving the strong ground he occupied by the apprehension that his adversary might, in that event, return suddenly and gain his rear. A council of war was called, which determined unanimously, that, should General Howe continue his march towards New York, all the troops raised on the west side of the Hudson should cross that river, to be afterwards followed by those raised in the eastern part of the continent, leaving three thousand men for the defence of the Highlands about the North river. In a letter to congress communicating this movement of the British army, and this determination of the council, the general said, "I can not indulge the idea that General Howe, supposing him to be going to New York, means to close the campaign, and to sit down without attempting something more. I think it highly probable, and almost certain, that he will make a descent with part of his troops into the Jerseys; and, as soon as I am satisfied that the present manoeuvre is real, and not a feint, I shall use all the means in my power to forward a part of our force to counteract his designs. "I expect the enemy will bend their force against fort Washington, and invest it immediately. From some advices, it is an object that will attract their earliest attention." He also addressed a letter to the governor of New Jersey, expressing a decided opinion that General Howe would not content himself with investing fort Washington, but would invade the Jerseys; and urging him to put the militia in the best possible condition to reinforce the army, and to take the place of the new levies, who could not, he suggested, be depended on to continue in service one day longer than the first of December, the time for which they were engaged. Immediate intelligence of this movement was likewise given to General Greene, who commanded in the Jerseys; and his attention was particularly pointed to fort Washington. As the British army approached Kingsbridge, three ships of war passed up the North River, notwithstanding the fire from forts Washington and Lee, and notwithstanding the additional obstructions which had been placed in the channel. {November 8.}