An Incident of tlie War. In the progress of the battle of Bull run. youthful orderly rode up to Colonel Matheson, inform him that the Black Horse cavalry, sheltered from his observation by a piece ol woods, were coming up on the right, and said he would take a cut with ds regiment across the fields, ther would be turned back upon their errau'4. I nig evclntion was per formed, irave ttie protection mat was desired, and the Black Horse gave up its purpose n that quarter. While the regiment, however, was adheriner to true position, the same youth who had Imparted the previous Bu?f;estiona rode up to the regiment again, and toid Col. Matheson he had better fall back on Center-vine, Center-vine, eg Ma duty at that point bad been thor ougrly performed. As this was about the first sign of orders (with one single excep'ion) he had received uaring the entiie day, Col. Matheson Matheson feil cutious to know whe ihis youn lieutenant lieutenant was, and tvhei.ee these orders came; he therefore turned sharply on the youth, who, he now perceived, could not be more than 22 23. and said: "Yourii man, I would like to know your name?" The youth replied that he was a son of Quartermaster-General Meies, "By whose authority, then, do you deliver me these orders?" The young man smiled, and remaikerf: "Well, sir the troth is, that for the last few hours I have been giving all the or ders for this division, and acting general, too, for there is no general in tne held." lhig m citent is worthy of notice, as one of the inci denu of the day. Borton Courier.