Lee was now pressing forward, flushed with victory, and threatening Washington. On the 1st of September the battle of Chantilly was fought, and in which those brave Generals, Kearney and Stevens, lost their lives. Learning by bitter experience the culpable folly of ignoring the genius and bravery of McClellan, and with the rebel army besieging the capital, General Halleck, in the excess of fear, was forced to again call for the services of the gallant commander of the Army of the Potomac, and General McClellan was once more placed in command of an army defeated and demoralized by the incompetency of its generals. The broken army of Pope was now united with that of the Army of the Potomac, and the army of Virginia ceased to exist as a separate organization. With the intense enthusiasm of the soldiers for McClellan, he soon brought order out of chaos, and in an incredibly short space of time he faced them about, in orderly columns, and started to repel the invading army of Lee, who was now crossing the Potomac. From reports made by my operatives at this time, it was ascertained that Lee had abandoned, if, indeed, he ever seriously entertained the idea of advancing directly upon the capital, and was now contemplating carrying the campaign into Maryland. Longstreet's division had left Richmond about the 5th day of August for Gordonsville, marching to Orange Court-house, he fell back to Gordonsville. Jackson fell back at the same time, and they both participated in the battle of Manassas, and in the fighting that followed. Jackson then crossed the river into Maryland, before Longstreet, who crossed a few days later, at or near Edwards' Ferry. On the 4th day of September, my operatives, who were watching the movement of the rebel army, reported that Lee had his headquarters on the Aldie turnpike, near Dranesville; while Jackson was near Fairfax Court-house. On the 9th, it was understood that the rebels had moved their entire army into Virginia, and it was presumed that his objective point was Baltimore. General McClellan left Washington on the 7th day of September, and established his headquarters at Rockville, having first made all arrangements for the defense of Washington, and placing General Banks in command of the troops at that place. By this time it was known that the mass of the rebel army had passed up the south side of the Potomac river, in the direction of Leesburg, and that a part of the army had crossed the river into Maryland. The uncertainty of Lee's intentions greatly distracted the authorities at Washington for the safety of that city, and they were fearful that he would make a feint towards Pennsylvania, and then suddenly seize the opportunity to attack the capital.