May 1 1862, Received Special Orders No. 35 from Gen. Halleck through Capt. Kelton, “I. Major-General Thomas’ division is hereby transferred from the Army of the Ohio to the Army of the Tennessee, and General Thomas will take command of the right wing, which will consist of his own and the divisions of Brigadier Generals W. T. Sherman, T. W. Sherman, S. a. Hurlbut, and T. A. Davies.

II. The divisions of Major-General McClernand, Major-General Wallace, and one division from General Buell’s army corps, to be designated to him, together with the heave artillery, will constitute the reserve, to be commanded by Major-General McClernand.

III. Brigadier-General Hamilton’s reserve division of Major-General Pope’s army will remain under General Pope’s direction until further orders.*

IV. Major-General Grant will retain the general command of the District of West Tennessee, including the Army Corps of the Tennessee see, and reports will be made to him as heretofore, but in the present movements he will act as second in command under the major-general commanding the department.

Brigadier General T. W. Sherman is hereby assigned to the command of the Sixth Division of General Grant’s army, now commanded by General McKean.”

The Papers of Ulysses S Grant, Vol 5, p 105

O.R., I, x, part 2, p 144-5