Confederate pontoon-bridge.

CHAPTER XXII.

GENERAL WILSON'S RAID--DESTROYING RAILROADS--HIS DISCOMFITURE
--RESULTS OF HIS RAID--REMOUNTS--MOVEMENT TO THE NORTH SIDE OF THE
JAMES--DECEIVING LEE--MY ISOLATED POSITION--ESTIMATE OF HANCOCK
--SUCCESS OF THE CAVALRY--THEIR CONSTANT DUTIES.

While I was absent on the expedition to Trevillian, the movement of
the Army of the Potomac across the James River was effected, and
Wilson, whom I had left behind for the purpose, was engaged in the
duty of covering its front and rear. Late on the night of June 12
he, with Chapman's brigade, crossed the Chickahominy at Long Bridge,
in advance of the Fifth Corps, and by 7 o'clock next morning had
driven the enemy's pickets up to White Oak bridge, where he waited
for our infantry. When that came up, he pushed on as far as Riddle's
Shop, but late that evening the Confederate infantry forced him to
withdraw to St. Mary's Church; for early in the morning General Lee
had discovered the movement of our army, and promptly threw this
column of infantry south of the Chickahominy to White Oak Swamp, with
the design of covering Richmond. From St. Mary's Church Wilson
guarded all the roads toward White Oak Swamp and Riddle's Shop,
McIntosh's brigade joining him on the 14th, by way of Long Bridge, as
the rear of the Army of the Potomac passed the Chickahominy. In the
performance of this duty Wilson did not have to fight any engagement
of magnitude, for the bulk of the enemy's cavalry had followed me to
Trevillian. During the 15th and 16th Wilson drew his troops in
toward the James River, and next day crossed it on the pontoon-bridge
and camped on the Blackwater, near Mt. Sinai Church. Here he
remained till the 22d of June--the same day I reached the White House
with Gregg and Torbert--when, under orders from General Meade, he set
out to cut the enemy's communications to the south and southwest of
Petersburg.

His instructions implied that the breaking up of the Petersburg and
Lynchburg, and Richmond and Danville railroads at Burkeville was the
most important part of his mission, and that when the work of
destruction began, it should be continued till he was driven off by
the enemy. Wilson's force consisted of about 5,500 men, General A.
V. Kautz, with the cavalry of the Army of the James, having joined
him for the expedition. In moving out Wilson crossed the Weldon road
near Ream's Station, first destroying it effectually at that po