the 4th artillery. The whole force, in the aggregate, numbered 3,447.
A second reconnaissance was made by Captain Mason, in company with Lieutenant Colonel Duncan, and Lieutenant Hardcastle, of the topographical engineers, in the afternoon of the 7th. Generals Scott and Worth also carefully reconnoitred the enemy's line of defences, and the necessary orders were then given for making the attack at daylight on the following morning. A night attack had been in contemplation, but this was abandoned, on account of the uncertain knowledge derived from the reconnaissances, daring as they were. The configuration of the ground, and the extent of the enemy's force, were ascertained, but a very imperfect idea could be formed 3f the nature of their defences, which were skilfully masked.
In the evening of the 7th, General Worth ordered one of Captain Drum's pieces, an eight-pounder, in charge of Lieutenant Benjamin, to be sent to the picket in front of Chapultepec. The enemy evidently anticipated a movement of some kind, and scouting parties were frequently sent out during the night. The advance guard of the American picket was once driven in, and several shots were fired; but, on seeing the port-fire lighted near Lieutenant Benjamin's gun, no further attempt at molestation was made, and every thing remained quiet till three o'clock in the morning of the 8th, when the troops were ordered under arms.
During the reconnaissances of the previous day, the enemy had presented an extended line of cavalry and infantry, with their right resting on Casa de Mata, and their left on El Molino del Rey. Midway between the two was a battery of four pieces of field artillery, supported by masses of infantry. In the course of the
