After the reduction of Fort Washington, and of Fort Lee on the opposite side of the North, or Hudson's River, the regiment continued the pursuit of the enemy across the Jerseys, by Elizabeth Town, Raway, &c. towards Philadelphia, and remained during the following winter at Amboy. The FORTY-SIXTH regiment occupied an old transport ship as a barrack, and being actively employed during the winter in constant escorts of ammunition, was continually attacked between that place and New Brunswick, on the way to Trenton, Princetown, and Burlington, where the advance of the British army had taken up winter quarters. During the winter, General Washington suddenly passed the Delaware river, and succeeded in surprising and making prisoners a corps of Hessians at Trenton, but he afterwards made a precipitate retreat. Being reinforced, he again crossed the river, and took up a position at Trenton. [Sidenote: 1777] Information having been received that the Americans were forming magazines at _Peek's Hill_, about fifty miles up the North River, the FORTY-SIXTH regiment was detached against that post, with a body of troops, which sailed from New York on the 22nd of March, 1777, and as they approached Peek's Hill, the Americans set fire to the stores, and retreated. The British landed, completed the destruction of the magazines, barracks, &c., and subsequently returned to their former quarters at New York. Afterwards taking the field with the army in the Jerseys, the FORTY-SIXTH regiment was engaged in the operations designed to bring the enemy to a general engagement; but the Americans kept close in their fortified lines in the mountains; an expedition against the populous and wealthy city of _Philadelphia_ was next undertaken. Embarking from Sandy Hook, the army, of which the FORTY-SIXTH formed part, proceeded to the Chesapeake, and landed on the northern shore of the Elk river on the 25th of August. The American army took up a position at _Brandywine_, to oppose the advance, and on the 11th of September the Royal forces moved forward to engage their opponents. The action proved decisive; the enemy was driven from his position, and forced to make a precipitate retreat. The FORTY-SIXTH sustained but trifling loss on this occasion. In order to harass the Royal forces, General Washington posted several detachments in such a manner as to command all the roads and avenues to their encampment. He seized every opportunity of drawing detached parties into ambuscades, which was the more readily effected, as the country was in his interest, and the provincial army abounded with persons fully acquainted with all its local advantages. A very considerable detachment employed in this manner, lay concealed in the depth of a forest at a short distance behind the British camp; it consisted of fifteen hundred men, commanded by General Wayne.