HEADQUARTERS ARMY OF THE POTOMAC, October 17, 1863-11. 30 p. m.

Commanding Officer First Corps:

The major-general commanding directs me to inform you that General Sedgwick reports that the enemy has a force of cavalry, infantry, and artillery on the old ox road not far from Chantilly, and directs that you be prepared to move to General Sedgwick's support at any moment after daylight.

Very respectfully, &c.,
A. A. HUMPHREYS,

Major-General, and Chief of Staff.

HEADQUARTERS FIRST CORPS, October 17, 1863.

Major-General HUMPHREYS,

Chief of Staff, Army of the Potomac:

Having received orders to be in readiness to march to General Sedgwick's support in the morning in case of necessity, what disposition shall I make in the meantime of the four regiments I have at Bull Run, and General Robinson's division at Cub Run?

Very respectfully,

JOHN NEWTON,

Major-General, Commanding.

HEADQUARTERS ARMY OF THE POTOMAC, October 17, 1863-11. 40 p. m.

Commanding Officer Second Corps:

The major-general commanding directs that you support Colonel Gibbs with any force that may be requisite, and that you hold yourself ready to move at daylight either to Manassas or to the support of General Sedgwick, who reports the enemy on the old ox road not far from Chantilly, with cavalry, infantry, and artillery.

Very respectfully, &c.,
A. A. HUMPHREYS,

Major-General, and Chief of Staff.

OCTOBER 17, 1863-11. 45 p. m.

Commanding Officer Third Corps:

The major-general commanding directs that you hold you corps in readiness to move at daylight. It is probable you may be ordered up to Manassas at that hour, or soon after.

You will direct General Birney to hold himself in readiness at daylight to move at any hour to Fairfax Court-House, when called upon by General King.

A. A. HUMPHREYS,

Major-General, and Chief of Staff.