over, recognized the necessity of coöperating with Worth for a combined attack, and satisfied that he could successfully operate within the city, withdrew the troops to the evacuated works.[1] The Mexicans made no attempt to reoccupy the portions of the town thus abandoned.
Meanwhile Worth, who had received no communication from the commander-in-chief, when he heard heavy and continued firing in the lower part of the town during the morning of the 23d, naturally concluded that Taylor's instructions directing him to cooperate had miscarried. Under this conviction he made his dispositions to assault the town on the west.[2] Two columns of attack were moved forward along the two principal streets leading to the great plaza. Worth's instructions, similar to those of Taylor, were given with a special view to protect the troops as much as possible from exposure. The men were to be masked whenever practicable, during their advance through the suburbs, and when they reached the houses they were to work their way carefully from street to street, by breaking through the sectional walls[3] and occupying the roofs. Artillery supported by reserve troops followed at suitable intervals.
The undertaking was both difficult and complicated. Across the streets, at well-chosen points, heavy walls of masonry, with embrasures for one or more guns, and supported by cross-batteries, had been erected; many of the houses were crenellated for musketry; while the assault was rendered doubly dangerous, from the fact that it was commenced at the time when Taylor suspended that on the eastern side, thereby enabling the enemy to throw the strength of his men and guns against Worth.[4] Nevertheless the
