He saw to his surprise that it had reached and passed the zenith.

It must now be at least two o'clock in the afternoon.

He was about to look at his watch when the Southern trumpets at that moment sounded the charge, and, knowing no other way to go, he and Dalton fell in with the Invincibles.
Howard was in command of the Northern army at this time, and from a roof of a house in Gettysburg he had been watching the Southern advance.
He and Doubleday gathered all their strength to meet it, and, despite the new troops brought by Rodes, Hill was unable to drive them back.
Harry felt, as he had felt all along, that marked hardening of the Northern resistance.
The battle wavered.

Sometimes the North was driven back and sometimes it was the South, until Hill at last, massing a great number of men on his left, charged with renewed courage and vigor.

The Union men could not withstand their weight, and their flank was rolled up.