In General Nelson's division, you see nearest the river Colonel Ammen's brigade, consisting of the Thirty-sixth Indiana, Sixth and Twenty-fourth Ohio; next, Colonel Bruer's brigade, First, Second, and Twentieth Kentucky; next, Colonel Hazen's brigade, Ninth Indiana, Sixth Kentucky, and Forty-first Ohio. Colonel Ammen's brigade arrived in season to take part in the contest at the ravine on Sunday evening. General Crittenden's division had two brigades: General Boyle's and Colonel W. L. Smith's. General Boyle had the Nineteenth and Fifty-ninth Ohio, and Ninth and Thirteenth Kentucky. Colonel Smith's was composed of the Thirteenth Ohio, and Eleventh and Twenty-sixth Kentucky, with Mendenhall's battery, belonging to the United States Regular Army, and Bartlett's Ohio battery. General McCook's division had three brigades. The first was commanded by General Rousseau, consisting of the First Ohio, Sixth Indiana, Third Kentucky, and battalions of the Fifteenth, Sixteenth, and Nineteenth Regular Infantry. The second brigade was commanded by Brigadier-General Gibson, and consisted of the Thirty-second and Thirty-ninth Indiana, and Forty-ninth Ohio. The third brigade was commanded by Colonel Kirk, and consisted of the Thirty-fourth Illinois, Twenty-ninth and Thirtieth Indiana, and Seventy-seventh Pennsylvania. General Lewis Wallace's division, which had been reorganized after the battle of Fort Donelson, now consisted of three brigades. The first was commanded by Colonel Morgan L. Smith, and consisted of the Eighth Missouri, Eleventh and Twenty-fourth Indiana, and Thurber's Missouri battery. The second brigade was commanded by Colonel Thayer, and contained the same regiments that checked the Rebels at the brook west of Fort Donelson,--the First Nebraska, Twenty-third and Sixty-eighth Ohio, with Thompson's Indiana battery. The third brigade was commanded by Colonel Whittlesey, and was composed of the Twentieth, Fifty-sixth, Seventy-sixth, and Seventy-eighth Ohio. Two brigades of General Wood's division arrived during the day, but not in season to take part in the battle. Beauregard's brigades were scattered during the night. They had retired in confusion before the terrible fire at the ravine from the gunboats. Officers were hunting for their troops, and soldiers were searching for their regiments, through the night. The work of reorganizing was going on when the pickets at daylight were driven in by the advance of the Union line.