FORT MONROE, VA., December 12, 1862.

Major-General HALLECK;

Major-General Peck telegraphs that his expedition to Zuni found the roads very bad. Our troops have nor succeeded in crossing. The enemy has been strongly re-enforced. Sharp firing has been going on all day across the river. General Peck says the demonstration is having the effect of drawing troops to this quarter, so that on the whole line was shall greatly benefit General Foster. I have a dispatch from General Foster this morning informing me that he should leave New Berne at daybreak yesterday. Wessells was with him. He says the enemy in his front has been strengthened, and he expects a hard fight.

The Pennsylvania regiments are arriving with wretched arms.

JOHN A. DIX,

Major-General, Commanding.

SUFFOLK, December 12, 1862.

Major-General DIX:

We have captured a rebel captain and 12 men; wounded and killed a good many of the enemy. The cars are running actively on the Petersburg road.

JOHN J. PECK,

Major-General.

FORT MONROE, December 12, 1862.

Major-General PECK:

I have twenty days' leave for you. Please come to me as soon as you can safely in reference to movements on the Blackwater.

JOHN A. DIX,

Major-General.

FORT MONROE, December 12, 1862.

Major-General PECK, Suffolk:

Nothing new from Fredericksburg. Burnside is in possession.

Have you received my dispatch notifying you of your leave of absence? You say the cars are running actively on the Petersburg road. You mean the enemy, of course. Cannot we use the road from Suffolk down to the river at Windsor?

JOHN A. DIX,

Major-General.

SUFFOLK, December 12, 1862.

Major-General DIX:

If all is favorable through the night from the Blackwater I will run down in the morning and see you, as per you telegram of this date.

JOHN J. PECK,

Major-General.