Accordingly, the first gray light of September 8 found the Americans waiting to assault the position. One cannon guarded the road from Mexico to Tacubaya. Brevet Colonel Garland's brigade and Captain Drum of the Fourth Artillery with his two Buena Vista 6-pounders were directly south of El Molino, at a distance of about 400 yards from it, to ward off a flank attack from Chapultepec, threaten the mill, and be ready to assist as might be necessary. On the ridge, not far to their left, stood Captain Huger with two 24-pound siege guns, Brevet Major Wright's party of stormers--twelve officers with five companies of 100 men each, drawn during the night from the six regiments of Worth's division--and a supporting body composed of Brevet Lieutenant Colonel C. F. Smith's light battalion. Some 500 yards farther to the left and higher up the ridge the guns of Duncan, who had charge of all the artillery, bore upon the Mexicans near Casa Mata, about 700 yards distant, with Colonel Clarke's brigade--now commanded, on account of Clarke's illness, by Brevet Colonel McIntosh--on the left of the pieces and General Cadwalader's brigade, acting as a reserve, at their right and rear. And finally, near the ravine, Major Sumner of the Second Dragoons with some 270 mounted men occupied our extreme left under orders to hold the Mexican cavalry in check and coöperate wherever he could. In all there were 3447 officers and men.[28.5] Apparently Worth's dispositions had been wisely planned, and a scrutiny of the Mexican position, could it have been made, would have confirmed the expectations of a quick victory. Deceived by Scott's feint against the southern front of the capital, Santa Anna had broken up his army during the night, and now, with a considerable part of it and some of the guns, he was fully two hours distant. No one officer commanded the troops before Worth. Only a sharp, strong thrust was required.[28.5] As soon as Huger could make out the low, white walls of El Molino, about a third of a mile distant, he opened fire; and at the same time Engineers Mason and Foster advanced some 350 yards. All was perfectly still in front. Both of them believed the position had been abandoned, and Mason sent Foster back to have Wright's party--now deployed in line--advance. Consequently, instead of waiting, as had been the plan, until the 24-pounders had perceptibly shaken the mill, the stormers advanced and masked those guns when some ten rounds had been fired. The Mexican pieces, which had been moved nearer the mill during the night, at once opened furiously with canister from an unexpected quarter, and soon a terrific fusillade burst from the parapeted azoteas of El Molino. In spite of it all, three of the pieces were taken, however.[28.5]