Sherman left Jackson with the last of his troops about noon on the 16th and reached Bolton, twenty miles west, before halting. His rear guard did not get in until two A.M. the 17th, but renewed their march by daylight. He paroled his prisoners at Jackson, and was forced to leave his own wounded in care of surgeons and attendants. At Bolton he was informed of our victory. He was directed to commence the march early next day, and to diverge from the road he was on to Bridgeport on the Big Black River, some eleven miles above the point where we expected to find the enemy. Blair was ordered to join him there with the pontoon train as early as possible.

This movement brought Sherman's corps together, and at a point where I hoped a crossing of the Big Black might be effected and Sherman's corps used to flank the enemy out of his position in our front, thus opening a crossing for the remainder of the army. I informed him that I would endeavor to hold the enemy in my front while he crossed the river.

The advance division, Carr's (McClernand's corps), resumed the pursuit at half-past three A.M. on the 17th, followed closely by Osterhaus, McPherson bringing up the rear with his corps. As I expected, the enemy was found in position on the Big Black. The point was only six miles from that where my advance had rested for the night, and was reached at an early hour. Here the river makes a turn to the west, and has washed close up to the high land; the east side is a low bottom, sometimes overflowed at very high water, but was cleared and in cultivation. A bayou runs irregularly across this low land, the bottom of which, however, is above the surface of the Big Black at ordinary stages. When the river is full water runs through it, converting the point of land into an island. The bayou was grown up with timber, which the enemy had felled into the ditch. At this time there was a foot or two of water in it. The rebels had constructed a parapet along the inner bank of this bayou by using cotton bales from the plantation close by and throwing dirt over them. The whole was thoroughly commanded from the height west of the river. At the upper end of the bayou there was a strip of uncleared land which afforded a cover for a portion of our men. Carr's division was deployed on our right, Lawler's brigade forming his extreme right and reaching through these woods to the river above. Osterhaus' division was deployed to the left of Carr and covered the enemy's entire front. McPherson was in column on the road, the head close by, ready to come in wherever he could be of assistance.

While the troops were standing as here described an officer from Banks' staff came up and presented me with a letter from General Halleck, dated the 11th of May. It had been sent by the way of New Orleans to Banks to be forwarded to me. It ordered me to return to Grand Gulf and to co-operate from there with Banks against Port Hudson, and then to return with our combined forces to besiege Vicksburg. I told the officer that the order came too late, and that Halleck would not give it now if he knew our position. The bearer of the dispatch insisted that I ought to obey the order, and was giving arguments to support his position when I heard great cheering to the right of our line and, looking in that direction, saw Lawler in his shirt sleeves leading a charge upon the enemy. I immediately mounted my horse and rode in the direction of the charge, and saw no more of the officer who delivered the dispatch; I think not even to this day.

The assault was successful. But little resistance was made. The enemy fled from the west bank of the river, burning the bridge behind him and leaving the men and guns on the east side to fall into our hands. Many tried to escape by swimming the river. Some succeeded and some were drowned in the attempt. Eighteen guns were captured and 1,751 prisoners. Our loss was 39 killed, 237 wounded and 3 missing. The enemy probably lost but few men except those captured and drowned. But for the successful and complete destruction of the bridge, I have but little doubt that we should have followed the enemy so closely as to prevent his occupying his defences around Vicksburg.

As the bridge was destroyed and the river was high, new bridges had to be built. It was but little after nine o'clock A.M. when the capture took place. As soon as work could be commenced, orders were given for the construction of three bridges. One was taken charge of by Lieutenant Hains, of the Engineer Corps, one by General McPherson himself and one by General Ransom, a most gallant and intelligent volunteer officer. My recollection is that Hains built a raft bridge; McPherson a pontoon, using cotton bales in large numbers, for pontoons; and that Ransom felled trees on opposite banks of the river, cutting only on one side of the tree, so that they would fall with their tops interlacing in the river, without the trees being entirely severed from their stumps. A bridge was then made with these trees to support the roadway. Lumber was taken from buildings, cotton gins and wherever found, for this purpose. By eight o'clock in the morning of the 18th all three bridges were complete and the troops were crossing.

Sherman reached Bridgeport about noon of the 17th and found Blair with the pontoon train already there. A few of the enemy were intrenched on the west bank, but they made little resistance and soon surrendered. Two divisions were crossed that night and the third the following morning.