and that its possession by the enemy is of great benefit to them. Will it be possible for us to get possession of it without incurring much risk?

R. B. MARCY,

Chief of Staff.

P. S. - A Lieutenant Rowley, signal officer, says he was at the mountain a day or two ago, and that there was no enemy there on Saturday.

R. B. M.

[19.]

HEADQUARTERS ARMY OF THE POTOMAC.

Camp near Rockville, September 9, 1862-12 m.

Brigadier General ALFRED PLEASONTON, Poolesville:

What news have you this morning? Please communicate fully and frequently with these headquarters. A dispatch sent to you last evening was by mistake directed to Major Pleasonton, instead of General Pleasonton. Please comply with the directions therein contained to push your cavalry as far to the front as you may deem consistent with safety.

By command of Major-General McClellan:

R. B. MARCY,
Chief of Staff.

[19.]

HEADQUARTERS ARMY OF THE POTOMAC.

Camp near Rockville, September 9, 1862-10 a. M.

Major-General KEYES, Yorktown:

Push forward Couch's batteries immediately to Alexandria, with instructions to report by telegraph to Colonel Hunt, chief of artillery. They are much needed here.

By command of Major-General McClellan:

R. B. MARCY,
Chief of Staff.

[18.]

HEADQUARTERS ARMY OF THE POTOMAC.

Camp near Rockville, September 9, 1862-6 p. M.

Major General E. D. KEYES, Yorktown:

Push forward with all speed the embarkation of Peck's division and artillery for Alexandria. It is needed.

By command of Major-General McClellan:

R. B. MARCY.

[18.]

HEADQUARTERS ARMY OF THE POTOMAC.

Rockville, September 9, 1862-12 m.

Major General J. E. WOOL, Baltimore, Md..,

This army moved forward to-day to the line of the Seneca Creek, occupying for the night Darnestown, Middleburg, Cracklintown, and Unity, with pickets out at Ridgeville and beyond. No large forces of the rebels this side the Monocacy so far as I can learn. Have you anything from above Frederick this morning?

GEO. B. McCLELLAN,

Major-General

[19.]