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during the afternoon of the 17th, and prepared to cross the stream in the morning.
The Confederates at the railway bridge, finding themselves flanked, fled to
Vicksburg.
Then
McClernand's men constructed a floating bridge there and just above, over which his and
McPherson's corps crossed the next morning at about eight o'clock.
Sherman crossed at the same hour,
and all pressed on over the wooded and broken country toward
Vicksburg.
Three miles and a half from that city
Sherman turned to the right and took possession of the
Walnut Hills, near the
Chickasaw Bayou,
1 without opposition, and cutting off the
Confederates at Haines's Bluff.
McPherson followed
Sherman's track some distance to the point where he turned to the right, and halted, while
McClernand, advancing on the line of the retreat of the
Confederates, on the direct high-way from
Jackson to
Vicksburg, bent his course a little to the left, and took position at Mount Albans, so as to cover the roads leading out of
Vicksburg on the southeast.
So, on the morning of the 19th of May,
Grant's army, which for more than a fortnight had subsisted off the country in which it was moving, completely invested
Vicksburg on the land side, and, by a successful movement of
Admiral Porter, his base of supplies was changed from
Grand Gulf to the
Yazoo.
Let us see what
Porter did. On the morning of the 16th
he went to the
Yazoo.
He left several of his iron-clad steamers below
Vicksburg, while others in the
Yazoo were ready for co-operation with
Grant.
When on the 18th he heard the booming of guns in the rear of the city, he knew that the army was approaching, and very soon he saw through his glass National troops on the
Walnut Hills.
These were
Sherman's men.
Porter immediately sent
Lieutenant-Commander Breese up the
Yazoo with the
De Kalb, Choctaw, Romeo, and
Forest Rose, to open communication with the army, which was accomplished in the course of a few hours.
The
De Kalb then pushed on toward Haines's Bluff, which the
Confederates had al-ready commenced to evacuate.
The latter fled precipitately, leaving every-thing behind them, such as stores, ammunition, gun-carriages, and an admirably constructed camp.
All these
Porter destroyed, and the next day he sent
Lieutenant Walker, with five gun-boats, to
Yazoo City.
Walker found the navy, yard and vessels in flames, and the citizens ready to surrender the town,
with fifteen hundred sick soldiers in the hospital.
Other public property which the
Confederates had not destroyed
Walker burned,
3 and then