From Manassas.The following is from the Richmond Examiner o! Wednesday:We have news from Manassas of active skirmishing and expedilonary parties on the extreme right of oi.r lines ; which position is occupied by thelamous and gallant Hampton Legion.A few days ago. as we learn, a Jeta* hment of one hundred of the cavalry of (lie Legion, under the command of Maj. M. C. Butler—as brave ana chivaiic a spirit as ever breathed, even in the State of South Carolina—made a brilliant dash in the vicinity of the enemy's lines. They went within three miles and a half of Alexandria, on the turnpike leading from Aecotink to that place, running the Federal pickets from two posts—one at (Jibbs' barn and the other at the forks of the road, where it branches oil* to Mount Vernon, two miles distant. The expedition took three prisoners, eight muskets, a lot of camp equipage, two Jersey wagons and four horses. Alter this sharp day's work of the detachment, it was the next morning in its camp at Bacon's Race Church as early as eleven o'clock.