...t arrived here, and have only time enough before the closing of the mail for Richmond to give some particulars of the fight at Manassas Gap, on the afternoon of the 23d, the day we left Winchester. Generals Longstreet and Hill preceded Gen. Ewell, and passing through Chester's Gap, in the Blue Ridge, Wright's brigade, of Anderson's division, was detached by Gen. Hill, and left to guard the pass until Gen Ewell, wh...