...ck and left a gap in the line of battle, and that General Birney by desire of General Sickles remonstrated at his conduct, but that Barnes refused to return to his position. I further declared that Zook 's Brigade, which came up gallantly to supply the defection of Barnes, marched over his troops, who were ordered to lie down for this purpose. As General Barnes denies all this roundly, under his ow...