Pope was now in command of the Federal Army of Virginia. It was one of the finest armies that ever faced a foe. Lee sent Jackson to fence with him. Jackson immediately called for reinforcements and rested his horses and men while awaiting a reply. In August, A. P. Hill came to his aid. Pope was now on the Rappahannock. When Jackson moved to attack him, Banks met him with all his strength in the Battle of Cedar Mountain, August 9. Banks seemed to be winning the battle, for the Confederate centre was broken, but Jackson’s supports turned the balance the other way. Jackson wrote to Lee: “On the evening of the 9th inst. God blessed our armies with another victory.” General Lee now joined Jackson at Gordonsville. The Federal Army was at Culpepper Court House. Pope took shelter across the river, and Lee conceived a plan to drive him out. Stonewall Jackson was selected for this work. On the 25th he began the move “in his old-time mystery” across the Rappahannock and marched away from the Federals, turning at right angles in the morning toward the line of the Federal communication with Washington. He passed Thoroughfare Gap, and fell on the enemy’s depot of supplies at Manassas Junction. One of Pope’s despatches, captured the next day, disclosed his plan to concentrate his forces at Manassas. Acting upon this, Jackson advanced and met the enemy on the old field of Bull Run. Jackson held his position in this bloody fight, and when the enemy fell back at midnight, he was content not to follow him. Both sides were ready at dawn of day. Longstreet just reached the field as Pope with his whole army ploughed the Confederate lines. Lee, now Jackson’s superior, helped win another victory for the South. The great leader of the Confederate army evidently understood General Jackson. He gave him something to accomplish, then let him alone. He had now something of importance in his mind. It was the capture of Harper’s Ferry. Lee was going to invade the North. The army crossed the Potomac and entered Frederick City. Stonewall Jackson was riding ahead. They occupied the city for several days. Meanwhile the Federal forces were gathering around Washington. The garrison at Harper’s Ferry did not move and Lee on September 10 sent Jackson to assault it. Four days later the white flag was raised over it. The men were taken prisoners, and their arms, ammunition, and supplies came to Jackson’s men. Immediately, he joined Lee at Sharpsburg; he was wanted, for McClellan was at Antietam Creek. [Illustration: MOST REVEREND JOHN M. FARLEY, D. D., LL. D., Archbishop of New York. ] At midnight of the 16th a part of Jackson’s men again became engaged; and when “at the dawn of the 17th, Hooker made his terrible attack on the left of the Confederate battle line, Stonewall Jackson stood in the way.”