HARRISBURG, October 11, 1862-5.30 p. m.

Major-General McCLELLAN, Knoxville:

The rebels are advancing on Gettysburg, and will be there to-night.

The farmers attacked their advance 5 miles west of Gettysburg, and

captured 1 prisoner.

He says the whole force will be in Gettysburg to-night; prisoner is

on his way to Harrisburg, by railroad. Can you get force in rear of enemy, to prevent their retreat to Fulton or Betford Counties? General Wool will have three regiments and battery at Hanover Junction tonight.

A. G. CURTIN.

HEADQUARTERS ARMY OF THE POTOMAC,
October 11, 1862-9.30 p. m.

Gov. ANDREW G. CURTIN, Harrisburg:

Your dispatch of 5.30 p. m. received, I have ordered a brigade (one of Crook's) from Hancock to McConnellsburg, to remain there until the rebels are disposed of. Our cavalry will be after them to-night. A brigade of infantry and battery have gone from Hagerstown to Chambersburg.

GEO. B. McCLELLAN,

Major-General.

HEADQUARTERS ARMY OF THE POTOMAC,
October 12, 1862-7 p. m.

General W. W. AVERELL,

Care General Crook, Hancock:

The rebel cavalry have recrossed into Virginia to-day, near the mouth of the Monocacy. You will, therefore, come by the most direct road, from your present position, to the vicinity of Williamsport, from which place you will report your arrival by telegraph, via Hagerstown, to these headquarters.

R. B. MARCY,

Chief of Staff.

HEADQUARTERS ARMY OF THE POTOMAC,
October 12, 1862-1.30

Commanding OFFICER BRIGADES OF BURNSIDE'S CORPS,

Monocacy Junction:

Send back to the Point of Rocks two of your regiments at once, by railroad, and have them use every effort to prevent the enemy's cavalry from crossing the river into Virginia. They are now scattered.

R. B. MARCY,

Chief of Staff.

P. S.-No time must be lost.

HEADQUARTERS ARMY OF THE POTOMAC,
October 12, 1862-1.45 p. m.

Commanding OFFICER OF BURNSIDE'S BRIGADES,

Monocacy Junction:

Send another regiment to Point of Rocks, if you can get cars, and