means of the Eleventh Corps, keep
Ewell from attacking my right. He accordingly directed the Eleventh
Corps to change front to meet Ewell. As it did so, Devin's cavalry
brigade fell back and took up a position to the right and rear of
this line just south of the railroad bridge.

The concentration of Rodes' and Early's divisions--the one from
Carlisle and the other from York--took place with great exactness;
both arriving in sight of Gettysburg at the same time. The other
division, that of Johnson, took a longer route from Carlisle by
way of Greenwood, to escort the trains, and did not reach the battle-
field until sunset. Anderson's division of Hill's corps was also
back at the pass in the mountains on the Chambersburg road. It
had halted to allow Johnson to pass, and then followed him to
Gettysburg, reaching there about dusk.

The first indication I had that Ewell had arrived, and was taking
part in the battle, came from a battery posted on an eminence called
Oak Hill, almost directly in the prolongation of my line, and about
a mile north of Colonel Stone's position. This opened fire about
1.30 P.M., and rendered new dispositions necessary; for Howard had
not guarded my right flank as proposed, and indeed soon had more
than he could do to maintain his line. When the guns referred to
opened fire, Wadsworth, without waiting for orders, threw Cutler's
brigade back into the woods on Seminary Ridge, north of the railroad
grading; a movement I sanctioned as necessary. Morrow's brigade
was concealed from the view of the enemy, in the woods where Reynolds
fell, and Biddle's brigade, by my order, changed front to the north.
It could do so with impunity, as it was behind a ridge which
concealed its left flank from Hill's corps, and was further protected
in that direction by two companies of the 20th New York State
Militia, who occupied a house and barn in advance, sent there by
the colonel of that regiment, Theodore B. Gates, whose skill and
energy were of great service to me during the battle.

It would of course have been impossible to hold the line if Hill
attacked on the west and Ewell assailed me at the same time on the
north; but I occupied the central position, and their converging
columns did not strike together until the grand final advance at
the close of the day, and therefore I was able to resist several
of their isolated attacks before the last crash came.

Stone's brigade in the centre had a difficul