The Trib . une says: " Tfie rebels appear to be
pushing on to their old position near Alexandria ; their pickets are said to be within three miles of that place. All remains quiet there, however, and there seems to be no active apprehension of an attack upon the capital. One report places General Johnston at Fairfax Court-house with 15,000 troops ; another speaks of him as marching to attack General Banks. It is also said that General Lee is about to take command of the remnant of General Garnett's force. General Patterson, in a pri- vate letter sent to Washington, says that he might easily have cut off General Johnston, but that the latter was recently reinforced by various troops, making an aggregate force of 35,000, while he himself had, all told, 20,000 only ; 19 of his regiments were three-months men, and all, with the exception of four, refused to stay with him an hour after their tune was up. General M'Clellan is on his way to Washington; he passed through Philadelphia yesterday, and was received with great enthusiasm. Governor Jackson is at Memphis. He had left 25,000 or 30,000 men under General M'Culloch and General Price, who were expected to march on Springfield, Mobile, to attack General Sigers force. Major-General Fremont has reached St. Louis."