LEFT FLANK MOVEMENT ACROSS THE CHICKAHOMINY AND JAMES—GENERAL LEE—VISIT TO BUTLER—THE MOVEMENT ON PETERSBURG—THE INVESTMENT OF PETERSBURG.RAID ON THE VIRGINIA CENTRAL RAILROAD—RAID ON THE WELDON RAILROAD—EARLY'S MOVEMENT UPON WASHINGTON—MINING THE WORKS BEFORE PETERSBURG—EXPLOSION OF THE MINE BEFORE PETERSBURG—CAMPAIGN IN THE SHENANDOAH VALLEY—CAPTURE OF THE WELDON RAILROAD.CHAPTER LVII.