Various were the speculations at head-quarters on the sudden movement of the enemy. Washington writes to General William Livingston (now governor of the Jerseys): “They have gone towards the North River and King’s Bridge. Some suppose they are going into winter quarters, and will sit down in New York without doing more than investing Fort Washington. I cannot subscribe wholly to this opinion myself. That they will invest Fort Washington, is a matter of which there can be no doubt; and I think there is a strong probability that General Howe will detach a part of his force to make an incursion into the Jerseys, provided he is going to New York. He must attempt something on account of his reputation, for what has he done as yet, with his great army?” In the same letter he expressed his determination, as soon as it should appear that the present manœuvre was a real retreat, and not a feint, to throw over a body of troops into the Jerseys to assist in checking Howe’s progress. He, moreover, recommended to the governor to have the militia of that State put on the best possible footing, and a part of them held in readiness to take the place of the State levies, whose term of service would soon expire. He advised, also, that the inhabitants contiguous to the water, should be prepared to remove their stock, grain, effects, and carriages, on the earliest notice. In a letter of the same date, he charged General Greene, should Howe invest Fort Washington with part of his force, to give the garrison all possible assistance. On the following day (Nov. 8), his aide-de-camp, Colonel Tilghman, writes to General Greene from head-quarters: “The enemy are at Dobbs’ Ferry with a great number of boats, ready to go into Jersey, _or proceed up the river_.” Greene doubted any intention of the enemy to cross the river; it might only be a feint to mislead; still, as a precaution, he had ordered troops up from the flying camp, and was posting them opposite Dobbs’ Ferry, and at other passes where a landing might be attempted; the whole being under the command of General Mercer.