This task fell to the Fourth Corps, and at 12 o’clock on the 23d I was notified that Wood’s division would make a reconnoissance to an elevated point in its front called Orchard Knob, and that I was to support it with my division and prevent Wood’s right flank from being turned by an advance of the enemy on Moore’s road or from the direction of Rossville.  For this duty I marched my division out of the works about 2 p.m., and took up a position on Bushy Knob.  Shortly after we reached this point Wood’s division passed my left flank on its reconnoissance, and my command, moving in support of it, drove in the enemy’s picket-line.  Wood’s took possession of Orchard Knob easily, and mine was halted on a low ridge to the right of the Knob, where I was directed by General Thomas to cover my front by a strong line of rifle-pits, and to put in position two batteries of the Fourth regular artillery that had joined me from the Eleventh Corps.  After dark Wood began to feel uneasy about his right flank, for a gap existed between it and my left, so I moved in closer to him, taking up a line where I remained inactive till the 25th, but suffering some inconvenience from the enemy’s shells.

On the 24th General Sherman made an attack for the purpose of carrying the north end of Missionary Ridge.  His success was not complete, although at the time it was reported throughout the army to be so.  It had the effect of disconcerting Bragg, however, and caused him to strengthen his right by withdrawing troops from his left, which circumstance led Hooker to advance on the northerly face of Lookout Mountain.  At first, with good glasses, we could plainly see Hooker’s troops driving the Confederates up the face of the mountain.  All were soon lost to view in the dense timber, but emerged again on the open ground, across which the Confederates retreated at a lively pace, followed by the pursuing line, which was led by a color-bearer, who, far in advance, was bravely waving on his comrades.  The gallantry of this man elicited much enthusiasm among us all, but as he was a considerable distance ahead of his comrades I expected to see his rashness punished at any moment by death or capture.  He finally got quite near the retreating Confederates, when suddenly they made a dash at him, but he was fully alive to such a move, and ran back, apparently uninjured, to his friends.  About this time a small squad of men reached the top of Lookout and planted the Stars and Stripes on its very crest.  Just then a cloud settled down on the mountain, and a heavy bank of fog obscured its whole face.

After the view was lost the sharp rattle of musketry continued some time, but practically the fight had been already won by Hooker’s men, the enemy only holding on with a rear-guard to assure his retreat across Chattanooga Valley to Missionary Ridge.  Later we heard very heavy cannonading, and fearing that Hooker was in trouble I sent a staff-officer to find out whether he needed assistance, which I thought could be given by a demonstration toward Rossville.  The officer soon returned with the report that Hooker was all right, that the cannonading was only a part of a little rear-guard fight, two sections of artillery making all the noise, the reverberations from point to point in the adjacent mountains echoing and reechoing till it seemed that at least fifty guns were engaged.