Lee now attempted to draw Meade away from the Potomac by concentrating his army to the east of the mountains. Hill and Longstreet advanced to Gettysburg, while Ewell was ordered to do the same. Lee himself lagged in the hope that Stuart would join him, and because of that, Meade, who was keenly on the alert, arrived in the neighborhood of Gettysburg first. On the last day of June, he was within a few miles of the town, while Lee was somewhat to the north and making for the same place. Stuart and his cavalry had harassed the Army of the Potomac in Virginia, but, unable to stay its advance, they crossed the Potomac, and, moving to the east of Meade, entered Carlisle shortly after Ewell had left for Gettysburg. Stuart's delay was owing to the fact that he did not know Lee's whereabouts. THE FIRST DAY AT GETTYSBURG. The two mighty armies were now within striking distance of each other. It was yet early in the day when a collision took place between a Confederate division and Reynolds' Corps on the western side of the town. Reynolds was one of the best officers in the Union army. He was engaged in directing the movements of his troops when he was struck in the head by a rifle bullet and instantly killed. General Doubleday succeeded him in command, but was unable to drive back the enemy. Howard arrived with the Eleventh Corps early in the afternoon and took charge of the whole force. These were mainly composed of Germans, who were so overwhelmingly stampeded by Stonewall Jackson at Chancellorsville. They did not appear to have recovered from that panic, for they fled pell-mell through Gettysburg, with the enemy whooping at their heels. Nearly all who did not run were cut down or they surrendered. Meade had sent Hancock to take chief command, and, aided by Howard, he rallied the shattered corps on the crest of Culp's Hill, behind the town. The keen eye of Hancock was quick to see that it was here the decisive struggle must take place, and he sent an urgent message to Meade, fifteen miles away, to lose not an hour in hurrying his troops forward. Meade followed the counsel. Some of his men arrived that night, some the next morning, while those from the greatest distance did not come in until the following afternoon. The line as formed by Hancock extended along Cemetery Hill on the west and south of Gettysburg. It was a formidable position, and Lee, after carefully studying it, decided to await the arrival of Longstreet and Ewell with their corps before making his attack. Events proved that the decision was a disastrous mistake on the part of the Confederate commander.