Wilson to Cold Harbor, to demonstrate in the direction of Richmond as
far as Mechanicsville, so as to cover Custer's movements. Merritt,
with the remaining brigades of his division, holding fast at
Baltimore crossroads to await events.

After Gregg and Custer had gone, it was discovered that the railroad
bridge over the Pamunkey, near the White House, had been destroyed
but partially--the cross-ties and stringers being burned in places
only--and that it was practicable to repair it sufficiently to carry
us over. In view of this information General Merritt's two brigades
were at once put on the duty of reconstructing the bridge. By
sending mounted parties through the surrounding country, each man of
which would bring in a board or a plank, Merritt soon accumulated
enough lumber for the flooring, and in one day the bridge was made
practicable. On the 22d Gregg, Wilson, and Custer returned. The
latter had gone on his expedition as far as Hanover Station,
destroyed some commissary stores there, and burned two trestle
bridges over Hanover Creek. This done, he deemed it prudent to
retire to Hanovertown. The next morning he again marched to Hanover
Station, and there ascertained that a strong force of the enemy,
consisting of infantry, cavalry, and artillery, was posted at the
South Anna bridges. These troops had gone there from Richmond en
route to reinforce Lee. In the face of this impediment Custer's
mission could not be executed fully, so he returned to Baltimore
crossroads.

The whole command was drawn in by noon of the 22d, and that day it
crossed the Pamunkey by Merritt's reconstructed bridge, marching to
Ayletts, on the Mattapony River, the same night. Here I learned from
citizens, and from prisoners taken during the day by scouting parties
sent toward Hanover Court House, that Lee had been, forced from his
position near Spottsylvania Court House and compelled to retire to
the line of the North Anna. I then determined to rejoin the Army of
the Potomac at the earliest moment, which I did by making for
Chesterfield Station, where I reported to General Meade on the 24th
of May.

Our return to Chesterfield ended the first independent expedition the
Cavalry Corps had undertaken since coming under my command, and our
success was commended highly by Generals Grant and Meade, both
realizing that our operations in the rear of Lee had disconcerted and
alarmed that general so much as to aid materially in forcing h