thus far has resulted from the non-arrival of the cars. Wagon trains have been waiting since yesterday morning for them. At 12 m. to-day only three cars had reached Salem, and eleven White Plains.

G. B. MCCLELLAN,

Major-General, Commanding Army of the Potomac.

[19.]

HEADQUARTERS ARMY OF THE POTOMAC,
November 7, 1862.

Major General A. E. BURNSIDE,

Commanding Left Wing:

General McClellan directs me to say that Piatt's brigade has been relieved at Piedmont by a brigade from Couch's corps, and has been ordered to join his division by way of Salem, stopping at that poinf for commissary supplies. The squadron of cavalry will have to remain at Piedmont until some other cavalry can be found to relieve it. General Bayard has been ordered to scout the line of the Rappahannock from Waterloo to the Orange and Alexandria Railroad; and the general wishes that, with Stoneman's cavalry and any other you may have at hand, you will scout the right flank from Waterloo to Orleans.

A. V. COLBURN,

Assistant Adjutant-General.

[19.]

HEADQUARTERS ARMY OF THE POTOMAC,
November 7, 1862.

Brigadier General J. F. REYNOLDS,

Commanding First Corps:

General McClellan directs me to say that General Bayards, with his cavalry, has been ordered to scout on the line of the Rappahannock from Waterloo to the line of the Orange and Alexandria Railroad, and that General Burnside, with Stoneman's cavalry and any other he may have, has been ordered to scout the right flank from Waterloo to Orleans. The general directs that you use your cavalry in t he best manner you can to obtain information and to keep your flanks scouted.

A. V. COLBURN,

Assistant Adjutant-General.

[19.]

HEADQUARTERS ARMY OF THE POTOMAC,
November 7, 1862-3.30 p. m.

Major-General SUMNER,

Commanding Second Corps:

GENERAL: The commanding general directs you to move your corps to the intersection of the direct road from Salem to the Cat-tail Branch of Cedar Run with the Centerville and Warrenton turnpike. This movement will be commenced to-morrow and completed the following day. The general desires the marchfor to-morrow to be an easy one. Upon arriving at the Centerville and Warrenton pike you will please encamp your command on the right of it, and on the Cat-tail Branch of Cedar Run. General Porter's command will go into camp about the same time on the left of the turnpike at the same point. General Franklin will move day after to-morrow to New Baltimore. General Burnside's command is posted is posted in neighborhood of Warrenton and