UNION CORRESPONDENCE, ETC.

HEADQUARTERS FIRST BRIGADE,
Harper's Ferry, Va., August 20, 1863.

Colonel SIMPSON,

Commanding Ninth Maryland Infantry:

COLONEL: The general is very anxious that you should be in Charlestown to-night, and fearing that my first messenger has not reached you I send another. You will get to Charlestown as soon as possible. When there you will communicate with Captain Summers. The remainder of your regiment, with subsistence stores, is now on its way from this place to join you there.

I am, very respectfully, your obedient servant,

GEO. D. WELLS,

Colonel, Commanding First Brigade.

HEADQUARTERS FIRST BRIGADE,
Harper's Ferry, Va., September 12, 1863.

Lieutenant-Colonel CLOWDSLEY,

Commanding Night Maryland Infantry:

COLONEL: The colonel commanding desires that your report of the demonstration to-day which caused the alarm be accompanied by a full and detailed report by Captain Summers of the events of the day, and the force and operations of the enemy in your vicinity.

He also desires to remind you of the instructions he has often given you verbally-that the holding of Charlestown is no object.

So far as Charlestown itself is concerned there is no more object in holding that than if you were encamped in an open plain.

I am, very respectfully, your obedient servant,

SAM'L F. WOODS,

Arting Assistant Adjutant-General.

HEADQUATRERS FIRST BRIGADE,

Harper's Ferry, Va., September 28, 1863.

Colonel SIMPSON,

Ninth Maryland Infantry:

COLONEL: I am instructed by the colonel commanding to state that information has been received here that a force of cavalry and infantry are berween your place and Winchester. You will direct