Hooker called upon Doubleday for aid, and a brigade was forwarded at double-quick across the cornfield in the face of a terrible storm of shot and shell. The Federals were further reënforced by Mansfield's corps, and while his divisions were deploying this veteran commander was mortally wounded. General Williams succeeded to the command of his corps, who pushed on across the open fields and seized a part of the woods on the Hagerstown road. At the same time Greene's division took position to the left of the Dunker church. This was on high ground and was the key to the Confederate left wing. But Greene's troops were exposed to a galling fire from the division of D. H. Hill and he called for reënforcements. General Sumner sent Sedgwick's division across the creek to reënforce Greene. His troops advanced straight towards the conflict. They found General Hooker severely wounded in the foot, which became so painful that he was carried off the field and left his troops in the command of Sumner. A sharp artillery fire was turned on Sedgwick before he reached the woods, west of the Hagerstown Pike, but once in the shelter of the thick trees he passed in safety to the western edge. Here the division found itself in an ambush. The Confederates had been heavily reënforced by several brigades under Walker and McLaws, having just arrived from Harper's Ferry, and had not only blocked the front but had worked around to the rear of Sedgwick, who was wounded in the awful slaughter that followed, but he and Sumner finally extricated their men after severe loss. The Federals were now reënforced by Franklin's fresh troops and were able to hold the cornfield and part of the woods over which the conflict had raged till the ground was saturated with blood. Sedgwick was twice wounded and carried from the field. The command of his division involved on General Howard. It was now about noon and the battle had been raging since early in the morning. Another deadly conflict was in progress near the center. Sumner's corps had crossed the stream and made a desperate assault on the Confederates under D. H. Hill, stationed to the south of where the battle had previously raged and along a sunken road, since known as "Bloody Lane." The fighting here was of a most desperate character and continued nearly four hours. The Federal advance was led by Generals French and Richardson, who captured a few flags and several prisoners, but failed to carry the heights along which the Confederates were posted. Richardson was mortally wounded while leading a charge and was succeeded by General Hancock, but his men finally captured Bloody Lane with the 300 living men who remained to defend it.