The fourth division of Hancock's corps, Mott commanding, was left at Todd's when the corps first came up; but in the afternoon it was brought up and placed to the left of Sedgwick's--now Wright's--6th corps.

In the morning General Sedgwick had been killed near the right of his intrenchments by rebel sharpshooters.

His loss was a severe one to the Army of the Potomac and to the Nation.

General H.G.Wright succeeded him in the command of his corps.
Hancock was now, nine P.M.of the 9th of May, across the left flank of Lee's army, but separated from it, and also from the remainder of Meade's army, by the Po River.

But for the lateness of the hour and the darkness of the night he would have attempted to cross the river again at Wooden Bridge, thus bringing himself on the same side with both friend and foe.
The Po at the points where Hancock's corps crossed runs nearly due east.
Just below his lower crossing--the troops crossed at three points--it turns due south, and after passing under Wooden Bridge soon resumes a more easterly direction.