At last the Federals retired to the line held at the beginning of the fight and the Confederates held the Rummel barn. There followed an artillery duel which lasted until night. Then Stuart withdrew to the York turnpike, leaving a regiment of cavalry picketed around the barn which was full of wounded Confederates. Stuart encamped that night on the York road. Early the next morning, he withdrew in the rain and rejoined the main army on the heights west of Gettysburg. The Confederates under Pickett had stormed the Federal heights opposite and had taken the guns, but as Hood, who was to support the charge was detained by the Federal cavalry, they could not hold their position, and finally had to retreat with the loss of many lives. The Federals did not pursue the Confederates, but remained the whole of the next day upon their entrenched heights. Being now nearly out of ammunition and supplies for his men, General Lee ordered a retreat on the night of July 4. He had a difficult task to perform. But happily his army had not been routed nor had the men lost confidence in him. As long as he was leading, they were willing to go anywhere and to endure anything. He had now before him a long march, and he was encumbered with four thousand prisoners and a wagon train fifteen miles long. It would take great skill and courage to conduct his army safely back into Virginia. In this extremity, he relied on his cavalry for aid. Both men and horses were by this time reduced in numbers and were worn out by hunger and fatigue. They, however, took promptly the position assigned by General Lee and guarded the army and its trains from the attacks of the Federal cavalry. General Stuart’s command guarded both wings of the army,—Stuart himself being on one side and Fitz Lee on the other. They, of course, were pursued by the Federal cavalry, and before they reached the fords of the Potomac, both Stuart and Fitz Lee had been engaged in several skirmishes. The wagon train reached Williamsport on July 6, and found the river too much swollen to cross. The wagons were massed in a narrow space near the river and were guarded by a small force. Here they were attacked by General Buford. This engagement is called “the Teamsters’ Battle,” because the teamsters assisted the troopers so well in holding the Federals in check. Together they succeeded in resisting the attack of Buford until the arrival of Stuart who had been engaged in driving the Federal cavalry from Hagerstown. A little later, Fitz Lee came thundering down the Greencastle road. Buford then retired without having taken or destroyed the trains so important to Lee.