To return to Chattanooga in October, 1863: one thing remained to be done before a new campaign could begin. A better mode of supplying the army must be found. Thomas had answered Grant's injunction to hold Chattanooga at all hazards by saying, "I will hold the town till we starve." The memorable words have been interpreted as a dauntless assurance of stubborn defence; but they more truly meant that the actual peril was not from the enemy, but from hunger. Rosecrans had begun to feel the necessity of opening a new route to Bridgeport before he was relieved, and on the very day he laid down the command, he had directed Brigadier-General W. F. Smith, sent to him to be chief engineer of his army since the battle, to examine the river banks in the vicinity of Williams Island, six or seven miles below the town by the river, and to report upon the feasibility of laying a pontoon bridge there which could be protected. The expectation had been that Hooker would concentrate his two corps at Bridgeport, make his own crossing of the Tennessee, and push forward to the hills commanding Lookout Valley. By intrenching himself strongly in the vicinity of Wauhatchie, he would confine the Confederates to Lookout Mountain on the west, and cover the roads along the river so as to make them safe for supply trains. The only interruption in the connected communications would then be around the base of Lookout itself, where the road could not be used, of course, so long as Bragg should be able to hold the mountain. If, however, a bridge could be laid somewhere in rear of such a fortified position, the road on the north bank of the river could be used, for this road ran across the neck of Moccasin Point, out of range of a cannonade from the mountain, and after a short haul of a mile or two, the wagon trains could recross the river by the bridge at the town.