troops on the north end of the line would have to deal with Confederate artillery fire protecting Lee's headquarters at the Turnbull House on Edge Hill. Counterattack, withdrawal Confederates from Brigadier General William R. Cox's Brigade of Major General Bryan Grimes's Division of the Second Corps held the Confederate line to the east of the broken Confederate main line. Except for Colonel Joseph Hamblin's brigade holding the captured sector of the line, the VI Corps had turned to the southwest so Cox's brigade was not immediately attacked nor did Cox counterattack Hamblin. When Brigadier General Lane withdrew from his position, he met Major General Cadmus Wilcox near Fort Gregg. Wilcox insisted on attempting to reclaim the Confederate lines or at least to block a further breakthrough. Near Fort Gregg, Wilcox and Lane assembled about 600 fugitives of Lane's and Thomas's brigades from the VI Corps breakthrough. From this position north of the main line, the Confederates attacked about 80 men of Hamblin's brigade under the command of Lieutenant Colonels Henry C. Fisk and John Harper who were holding the end of the captured line. The Union soldiers withdrew in the face of this large force, leaving two captured guns behind. Lane's men then formed a line facing west along Church Road perpendicular to the old line. This minor advance, which lasted less than an hour, still left over of the Confederate line in the Union Army's possession. About 15 minutes thereafter, Gibbon's XXIV Corps advanced toward the Church Road line and Forts Gregg and Whitworth. An immediate attack by the lead brigade from Brigadier General Robert S. Foster's division under the command of Colonel (Brevet Brigadier General) Thomas O. Osborn recaptured the line and two cannons. The defenders from Lane's and Thomas's brigades in the newly formed line and the Mississippi brigade of Brigadier General Nathaniel H. Harris, who had moved in front of the forts, retreated toward Forts Gregg and Whitworth. Osborn's brigade had reversed the minor setback in the Union advance without loss of life. Gibbon continued to advance the XXIV Corps toward the Appomattox River near the Whitworth house. Forts Gregg and Whitworth The survivors of Brigadier Generals James H. Lane's and Edward L. Thomas's brigades withdrew northeast to the old Dimmock Line defenses between the VI Corps breakthrough and Petersburg. Brigadier General Lane and Major General Wilcox stationed the men in Fort Gregg and Fort Whitworth,