[Headquarters, near Harlem] 9th [October].ー Early in the morning, three ships, two of 40 guns, and one frigate, with two or three tenders, stood up the North River. They were briskly cannonaded from Fort Washington and Fort Constitution. They however passed our works and the chevaux-de-frise; the American galleys, small craft, and two large ships standing on before them. The two ships were run on shore near Phillips's mills, and two of the galleys near Dobbs' Ferry. The enemy took possession of the two galleys, and got them off. A boat landed a number of men, who plundered a store, stove the casks, and then set the store on fire, and left it. The Americans soon extinguished the fire.

Our General ordered Col. [Paul Dudley] Sargent, with 500 infantry, 40 light-horse, Capt. [Jotham] Horton of the artillery, with two 12 pounders, and Capt. [Edward] Crafts with a howitzer, to march iminediately, with all possible expedition, to Dobbs' Ferry. The enemy took a schooner loaded with rum, sugar, wine, &c. and sunk a sloop, which had on board the machine, invented by, and under the direction of, a Mr. Bushnell, intended to blow up the British ships. This machine was worked under water. It conveyed a magazine of powder, which was to be fixed under the keel of a ship, then freed from the machine, and left with clock-work going, which was to produce fire when the machine had got out of the way. Mr. Bushnell had great confidence of its success, and had made several experiments which seemed to give him countenance; but its fate was truly a contrast to its design.²