I had started McClernand with his corps of four divisions on the 29th of March, by way of Richmond, Louisiana, to New Carthage, hoping that he might capture Grand Gulf before the balance of the troops could get there; but the roads were very bad, scarcely above water yet.  Some miles from New Carthage the levee to Bayou Vidal was broken in several places, overflowing the roads for the distance of two miles.  Boats were collected from the surrounding bayous, and some constructed on the spot from such material as could be collected, to transport the troops across the overflowed interval.  By the 6th of April McClernand had reached New Carthage with one division and its artillery, the latter ferried through the woods by these boats.  On the 17th I visited New Carthage in person, and saw that the process of getting troops through in the way we were doing was so tedious that a better method must be devised.  The water was falling, and in a few days there would not be depth enough to use boats; nor would the land be dry enough to march over.  McClernand had already found a new route from Smith’s plantation where the crevasse occurred, to Perkins’ plantation, eight to twelve miles below New Carthage.  This increased the march from Milliken’s Bend from twenty-seven to nearly forty miles.  Four bridges had to be built across bayous, two of them each over six hundred feet long, making about two thousand feet of bridging in all.  The river falling made the current in these bayous very rapid, increasing the difficulty of building and permanently fastening these bridges; but the ingenuity of the “Yankee soldier” was equal to any emergency.  The bridges were soon built of such material as could be found near by, and so substantial were they that not a single mishap occurred in crossing all the army with artillery, cavalry and wagon trains, except the loss of one siege gun (a thirty-two pounder).  This, if my memory serves me correctly, broke through the only pontoon bridge we had in all our march across the peninsula.  These bridges were all built by McClernand’s command, under the supervision of Lieutenant Hains of the Engineer Corps.

I returned to Milliken’s Bend on the 18th or 19th, and on the 20th issued the following final order for the movement of troops: 

HEADQUARTERS DEPARTMENT OF THE TENNESSEE, MILLIKEN’S BEND, LOUISIANA, April 20, 1863.

Special Orders, No. 110. * * * * * * * VIII.  The following orders are published for the information and guidance of the “Army in the Field,” in its present movement to obtain a foothold on the east bank of the Mississippi River, from which Vicksburg can be approached by practicable roads.

First.—­The Thirteenth army corps, Major-General John A. McClernand commanding, will constitute the right wing.

Second.—­The Fifteenth army corps, Major-General W. T. Sherman commanding, will constitute the left wing.

Third.—­The Seventeenth army corps, Major-General James B. McPherson commanding, will constitute the centre.