Osterhaus, Morgan L. Smith and Hugh Ewing, respectively. Also the 2nd division of the 17th Army Corps, commanded by Brig.-Gen. John E. Smith. Thirteen brigades were represented by Sherman’s re-enforcements. [Illustration: Steamboat Being Warped Through “The Suck” Before the Dam at Hale’s Bar was built in the Tennessee] A detachment from the Army of the Potomac consisting of the 11th and 12th Army Corps, commanded by Maj.-Gen. Joseph Hooker, were sent from Virginia to help lift the siege. The 11th corps was commanded by Maj.-Gen. O. W. Howard. Howard had the 2nd and 3rd divisions, commanded by Brig.-Gen. Adolph von Steinwehr and Maj.-Gen. Carl Schurz, respectively. The 12th corps, commanded by Maj.-Gen. Henry W. Slocum, had the 1st and 2nd divisions, commanded by Brig.-Generals Alpheus S. Williams and John W. Geary, respectively. Twelve brigades were represented by Hooker’s re-enforcements. Hooker’s troops left Virginia on September 25th. These troops came by the B. and O. Railroad via Indianapolis, Louisville, Nashville and Bridgeport. The advance of this column reached Bridgeport September 30th. They were supposed to have helped to reopen the Tennessee River the next day. This was impossible due to his supply trains not being here at that time. Rosecrans had devised a plan whereby the river supply line could be opened up. His plan was to seize Brown’s Ferry from Chattanooga, and bring Hooker forward into Lookout Valley at the same time. The execution of this plan only awaited completion of pontoon-boats for the necessary bridge. When they were ready, Wheeler made another raid north of the river, delaying the Union troops again. The date for the execution of this movement was then set for October 19th. On this date Rosecrans personally selected the site for throwing the bridge. It has been reported that Rosecrans rowed a boat himself. When he returned to his headquarters he found orders relieving him, and placing Thomas in command. On October 23rd, Gen. Grant arrived in Chattanooga. He approved of Rosecrans’ plan and ordered it executed at once. Thomas at once repeated Rosecrans’ order to Hooker, ordering him forward into Lookout Valley. Hooker’s supply trains reached him October 26th. He left Bridgeport on the 27th, reaching Brown’s Ferry the next day. In the meantime, during the night of the 26th, a part of two Union brigades marched across Moccasin Point, concealing themselves near Brown’s Ferry. About 3:00 A. M. of the 27th, there were 50 pontoon-boats placed in the Tennessee River, each carrying 30 men. These boats floated down the river under cover of darkness, rounding Moccasin Point unobserved by the Confederate pickets. By a quick crossing from the north bank to the south bank, they took the Confederates by surprise and soon captured this position. The pontoon-boats were then leashed together, forming a bridge across the river. At this time the troops which had marched to this point crossed