From a private source it is learned that Mr. J. W. Baughman, editor and proprietor of one of the Frederick papers, was yesterday arrested at Sandy Hock, near Harper's Ferry, by the Federal troops.
What the charges against him are is not learned.
The Washington correspondent of the Baltimore Exchange, July 12, says:
The major portion of General McDowell's column received orders this morning to prepare to march.
The New Jersey Fourth Regiment, Col. Miller, has been designated as the principal one from which scouting detachments be chosen.
Some of the Washington (D. C.) companies were formerly assigned this position.
Five regiments of troops have passed into Virginia since yesterday morning.
The 2d Maine Regiment on Thursday evening were sent forward from Alexandria, supplied with ages and other instruments, to clear away the trees which the Confederates and placed across the roads.
It is evident that an advance must be made