_August 8._--To-day Kilpatrick was ordered with his regiments to reconnoitre in the direction of Orange Court House. He advanced by way of Chancellorsville and old Wilderness Tavern; but on approaching the Court House we found it occupied by a heavy force of the enemy. It is evident that the Rebel army is advancing with a show of fight towards the upper fords of the Rapidan, where, we understand, Generals Buford and Bayard are picketing. After ascertaining all we could about present and prospective movements, we returned to our old camp, having made a swift and tedious march. BATTLE OF CEDAR MOUNTAIN. On the ninth was fought the memorable battle of Cedar or Slaughter's Mountain, in which both sides claimed the victory. The Confederates certainly had the advantage of position, having taken possession of the wooded crest before the arrival of our advance; and they also greatly outnumbered the Union ranks. But their loss was nearly double our own, and nearly the same ground was occupied by the combatants at night, which each held in the beginning of the fight. The cavalry was not conspicuously engaged in this bloody fray, except such portions of it as were escort or body-guard to officers in command, and among these some were killed. The main cavalry force watched the flanks, doing good service there. _August 10._--At an early hour of the day the Harris Light was ordered to report at Culpepper Court House, and we were soon on the march. On arriving at our destination we found the place well nigh filled with our wounded from the battle of yesterday. It is estimated that not less than fifteen hundred of our men were killed and wounded, about a thousand of the latter having found a refuge here. The seventh part of the casualties of a battle, on an average, will number the killed and mortally wounded; the others claim the especial attention of their comrades. It is heart-sickening to witness their bloody, mangled forms. All the public buildings and many private residences of this village are occupied as hospitals, and the surgeons with their corps of hospital stewards and nurses are doing their work, assisted by as many others as have been detailed for this purpose, or volunteer their services. The Rebel wounded who have fallen into our hands receive the same attention that is bestowed upon our own men, many of them acknowledging that they are far better off in our care than they would be among their confederates. These hospitals are all much more quiet than one would naturally suppose. How calmly the brave boys endure the wounds they have received in defence of their beloved country! Only now and then can be heard a subdued sob, or a dying groan; while those who are fully conscious, though suffering excruciating pain, are either engaged in silent prayer or meditation, or reading a Testament or a last letter from loved ones, and patiently awaiting their turn with the surgeon or the nurse.