watch the enemy, fell into an ambuscade on the 25th, and after some fighting, in which several of his men were killed, was captured with his whole command.[1] Later, Taylor received information that the enemy was preparing to cross below his position, and not believing that Arista would make an attempt upon his fortified camp, rightly concluded that Point Isabel was the object of his movement. On the 1st of May, the fort being brought into a good state of defence, he left in the work the 7th infantry under Major Brown, with Captain Lowd's and Lieutenant Bragg's companies of artillery, and marched with the main force to Point Isabel, which he reached the next day. Taylor left his position while Arista was slowly passing his army across the river in two canoes.
When Arista became aware that the enemy had anticipated his movements, he gave orders for the batteries at Matamoros to open fire on the American fort, and also sent Ampudia with a force and four guns to lay siege to it. The cannonade commenced at five o'clock in the morning of May 3d. Meantime the Mexican general, having united his forces with those of Torrejon, took up a position at Palo Alto, cutting off communication between the besieged and Point Isabel. The boom of the guns, however, was heard at the latter place, and Captain Walker was sent with a small cavalry escort to endeavor to communicate with Major Brown. Making a wide circuit, he gained the rear of the enemy; then, concealing his men in the chaparral, he made his way alone by night to the American work, and on the morning of the 5th returned to Point Isabel with Brown's despatch announcing the safety of the garrison and the slight effect of the enemy's cannonade.[2]
Taylor now determined to go to the relief of the fort with supplies of ordnance and provisions, and on
