GENERAL ORDERS,
HDQRS. LEFT WING, SIXTEENTH A. C., Numbers 12.
La Grange, Tenn., June 9, 1863.

I. The cavalry of this command is temporarily organized as follows:

First Brigade, Colonel McCrillis, THIRD Illinois Cavalry, commanding, -- THIRD Illinois Cavalry, Sixth Illinois Cavalry, and NINTH Illinois Cavalry.

SECOND Brigade, Colonel Edward Hatch, SECOND Iowa Cavalry, commanding. - SECOND Iowa Cavalry, THIRD Michigan Cavalry, and First WEST Tennessee Cavalry.

THIRD Brigade, Colonel Cornym, Tenth Missouri Cavalry, commanding. -Tenth Missouri Cavalry, Seventh Kansas Cavalry, battalion FIFTH Ohio Cavalry, and battalion Fifteenth Illinois Cavalry.

Fourth Brigade, Lieutenant-Colonel Meek, Eleventh Illinois Cavalry, commanding. -Eleventh Illinois Cavalry, detachment Sixth Illinois Cavalry, detachment Seventh Illinois Cavalry, and SECOND WEST Tennessee Cavalry.

II. The First, SECOND, and Fourth Brigades will constitute the First DIVISION, under command of Colonel J. K. Mizner, chief of cavalry of left wing, SIXTEENTH Army Corps.

III. Colonel Cornym, Tenth Missouri Cavalry, with the THIRD Brigade, will report to Brigadier-General Dodge, as heretofore.

By order of Major General R. J. Oglesby:

S. WAIT,

Major and Assistant Adjutant-General.

NEAR Vicksburg, MISS., June 10, 1863.

Rear-Admiral DAVID D. PORTER,

Commanding Mississippi Squadron:

I sent you a dispatch by signal, requesting you to send a gunboat to meet transports known to be on their way here loaded with troops. I have been informed of thirteen being loaded at Memphis, and expected them here last night. Their non arrival causes me much uneasiness lest they may be interrupted some place by a battery of the enemy. I have information of 19,000 troops being on the way here besides those already arrived, and would request that, until they all get here, a gunboat ply about Island Numbers 65 and other dangerous points below it. I am aware, admiral, that heavy drafts have been made on your fleet above Vicksburg, but hope you will still be able to comply with the request made herein.

I am fortifying Haynes' Bluff, and intend to hold it. At present I do not think the enemy are near there. All the forces coming to me now are being sent to Haynes' Bluff, and I need not tell you how anxious I feel for the arrival of those I know to have started.

U. S. GRANT.

CAIRO, ILL., June 10, 1863.

Honorable E. S. STANTON, Secretary of War:

Three brigades and two batteries of NINTH Army Corps will reach Vicksburg to-day. Two remaining brigades and two batteries will leave here to-day. General Parke left Cairo for the south this morning. Cipher now coming from Vicksburg; will push it along. Still raining.

A. STAGER.