September 13.-Negley's, Baird's, and Brannan's divisions remained in their camps of yesterday awaiting the arrival of McCook's corps, which had been ordered to close up to the left. Reynolds concentrated his division on the road from Cooper's Gap to Catlett's Gap. Two deserters from Eighteenth Tennessee state that they belong to Buckner's corps. Buckner's corps consists of eight brigades and two batteries of six guns each; were in the fight with Negley. Saw a brigade of Forrest's cavalry, commanded by Forrest in person, pass toward the fight on the 11th. Hill's and Buckner's corps were both engaged. Bragg's army is concentrated at La Fayette. Headquarters moved by way of Cooper's Gap to the foot of the mountain.

September 14.-General Reynolds took up a position at Pond Spring with his two infantry brigades, and was joined by Wilder at that place. Turchin's brigade, of Reynolds' division, made a reconnaissance to the mouth of Catlett's Gap with the Ninety-second Illinois [mounted infantry]. Was opposed by rebel mounted pickets from Chickamauga Creek to mouth of Catlett's Gap, at which place he found their reserve drawn up, also a strong line of skirmishers to the right of the road; but having received instructions to avoid bringing on an engagement, he returned to camp with the brigade, leaving two regiments on Chattanooga Valley road, strongly posted on outposts. General Brannan advanced one brigade of his division to Chickamauga Creek, east of Lee's Mill, 1 mile to the right and south of Reynolds' position at Pond Spring. A mounted reconnaissance was also pushed forward to within a mile of Blue Bird Gap without encountering any of the enemy. A negro who had been taken before General Buckner yesterday and released again reports that Buckner and his corps are in Catlett's Gap preparing to defend that place. A negro woman, lately from the neighborhood of Dug Gap, reports a large force of rebels between Dug Gap and La Fayette.

September 16.-Corps headquarters and First and Second Divisions remained camped, as last reported, at foot of Stevens' Gap. Turchin's brigade, of Reynolds' division, made a reconnaissance toward Catlett's Gap. The enemy fell back as he advanced, until he came upon a force strongly posted, with two pieces of artillery, in the road. He made a second reconnaissance at 2 p.m. that day with but little further result, as he could advance but a short distance farther, the enemy being in force in his front.

September 17.-First, Second, and Third Divisions changed their positions from their camps of yesterday: Baird's [First] division, with its right resting at Gower's Ford and extending along Chickamauga Creek to Bird's Mill; Negley's [Second] division, with its right at Bird's Mill and its left connecting with Van Cleve's division at Owens' Ford; Brannan's [Third] division on the right of the First, covering four fords between Gower's Ford and Pond Spring. One brigade of the Fourth Division [Reynolds'] thrown out in front of Pond Spring, on the Catlett's Gap road, covering the pass through the mountains. Wilder's brigade detached and ordered to report to department headquarters. The left of McCook's corps closed in; connected with our right near Pond Spring.

September 18.-At 4 p.m. the whole corps moved to the left along Chickamauga Creek to Crawfish Spring. On arriving at that place received orders to march on the cross-road leading by Widow Glenn's house to the Chattanooga and La Fayette road, and take up a position near Kelly's farm, on the La Fayette road, connecting with Crittenden on my right at Gordon's Mills. The head of the column