When Pope moved out the next day (August 30th) to strike Lee's left, and found it withdrawn, he imagined that the enemy was in retreat, and immediately ordered McDowell to follow it up and "press the enemy vigorously the whole day." Porter's corps--the advance of McDowell's force--had no sooner begun this movement than it struck the foe in a strong position, and was subjected to a heavy artillery fire. Then a cloud of dust was seen to the south, and it was evident that Lee was pushing a force around on the flank. McDowell sent Reynolds to meet and check it. Porter then attempted to obey his orders. He advanced against Jackson's right in charge after charge, but was met by a fire that repelled him every time with bloody loss. Moreover, Longstreet found an eminence that commanded a part of his line, promptly took advantage of it by placing a battery there, and threw in an enfilading fire. It was impossible for anything to withstand this, and Porter's corps in a few minutes fell back defeated. The whole Confederate line was {169} advanced, and an attempt was made, by still further extending their right, to cut off retreat; but key-points were firmly held by Warren's brigade and the brigades of Meade and Seymour, and the army was withdrawn in order from the field whence it had retired so precipitously a year before. After dark it crossed the stone bridge over Bull Run, and encamped on the heights around Centreville. The corps of Sumner and Franklin here joined Pope, and the whole army fell back still further, taking a position around Fairfax Court House and Germantown. Lee meanwhile ordered Jackson to make another of the flank marches that he was so fond of, with a view of striking Pope's right and perhaps interrupting his communication with Washington. It was the evening of September 1st when he fell heavily upon Pope's flank. He was stoutly resisted, and finally repelled by the commands of Hooker and Reno, and a part of those of McDowell and Kearny. General Stevens, of Reno's corps, was killed, and his men, having used up their ammunition, fell back. General Kearny sent Birney's brigade into the gap, and brought up a battery. He then rode forward to reconnoitre, came suddenly upon a squad of Confederates, and in attempting to ride away was shot dead. Kearny was one of the most experienced and efficient soldiers in the service. He had lost an arm in the Mexican war, was with Napoleon III. at Solferino and Magenta, and had just passed through the peninsula campaign with McClellan. [Illustration: MILL AND HOTEL AT SUDLEY SPRINGS.] [Illustration: MAP OF SECOND BATTLE OF BULL RUN, SHOWING IMPORTANT POSITIONS OCCUPIED FROM AUGUST 27th TO SEPTEMBER 1st.]