On the next day, the 10th, he withdrew, taking the railroad cars at Warrenton. On reaching Warrenton Junction a salute was fired. The troops, which had been drawn up in line, afterward broke ranks, when the soldiers crowded around him and many eagerly called for a few parting words. He said in response, while on the platform of the railroad depot, “I wish you to stand by General Burnside as you have stood by me, and all will be well. Good-bye.” To this there was a spontaneous and enthusiastic response. The troops were also drawn up in line at Bristow’s Station and Manassas Junction, where salutes were fired and he was complimented with enthusiastic cheers. On reaching Washington he proceeded immediately to the depot, and passed on to Philadelphia and Trenton, where he arrived early on the 12th. What was now the military aspect? The movement of General McClellan’s army, after crossing the Potomac, was towards Gordonsville. This made a movement on the part of the Confederate general Lee necessary in order to prevent the Federal army from getting between him and Richmond. For this purpose he attempted to move from Winchester through the gaps of the Blue Ridge to Culpeper. The larger part of his force had passed through, when the gaps were taken and held by General McClellan. At the same time General Sigel had advanced from Washington, and lay near the Blue Ridge, covering at once Washington, observing the gaps to the Rappahannock, and protecting the railroad communication to that river. The bridge at Rappahannock Station had already been seized by the cavalry, under General Bayard. The available force of General McClellan was about one hundred and twenty thousand men; that of General Lee consisted of about sixty thousand able men at Culpepper and Gordonsville, and thirty thousand in the Shenandoah Valley, near Strasburg. The distance from Warrenton to Gordonsville is about fifty miles, and from Warrenton to the Rapidan, thirty-five miles; from Strasburg to Gordonsville, by Staunton and Charlottesville, one hundred and thirty-five miles; and by the only other practicable route, one northwest of Gordonsville, and perpendicular to General McClellan’s line of advance, about one hundred miles. In his position it was necessary for General Lee to defend the line of the Rapidan, or endeavor to effect a junction with the force in the Shenandoah Valley, under General Jackson, or fall back upon Richmond, in a country without a line of defence, with General McClellan close upon him, leaving General Jackson to shift for himself. The defence of the Rapidan was impracticable from the course of the river from the Alexandria railroad to the Blue Ridge. The efforts to join General Jackson would have uncovered Richmond, and the attempt to fall back on Richmond would have at least hazarded the demoralization of his army, and enabled General McClellan to turn the defensible parts of the Rappahannock, and the line of the North Anna.