Gen. Taylor’s promise was fulfilled, and Fort Brown was rescued. But it was found impossible immediately to follow up the victory. Every obstacle was, however, by untiring energy and perseverance overcome; when, on the 17th of May, Arista offered an armistice. It was now too late: the offer was declined. The next day Taylor, without resistance, took possession of Matamoras. His instructions required his advance into the interior, but for a long period, a period filled up by the hero with impatient protests to the War Department, and entreaties for further means of transportation, and anxious efforts, on his own part, to supply them, he was compelled to remain inactive. At length, however, the army was set in motion. Its object was Monterey, a place strong by nature, amply fortified, and maintained by an army of 7000 troops of the line, and 3000 irregulars. Against this stronghold he marched with an army comprising 425 officers, and 6220 men. Against the forty-two pieces of cannon of the Mexicans, he arrayed but one 10 inch mortar, two 24 pounder howitzers, and four light field batteries of four guns each—the mortar being the only piece suitable to the operations of a siege. With these fearful odds against him he advanced upon Monterey. Gen. Taylor arrived before the city on the 19th, and established his camp three miles from its defences. Reconnaissances were made, and it was found possible to turn the position of the enemy, and gain the heights in his rear. The gallant Worth was detached upon this duty, and to carry the enemy’s works. From this moment the operations became two-fold—the assailing party of Worth being independent of the command of Taylor, and the object of the latter principally to divert the enemy from Worth.