Again the Northern artillery proved its worth.

The great batteries sent a hurricane of death over the heads of the men in blue and toward the town of Sharpsburg.

Despite all the valor of the Southern veterans, the heavy masses of the Union men forced their way across the bridge to the peninsula.

Lee's batteries and infantry regiments could not hold them.
It seemed now that Lee's own force was to be destroyed and that victory was won, but fortune had in store yet another of those dazzling recoveries for the South.

At the very moment when Lee seemed overwhelmed, A.P.Hill, as valiant and vigorous as the other Hill, arrived with the last of the Harper's Ferry veterans, having marched seventeen miles, almost on a dead run.