With each day our confidence in the strength of our position increased; and we soon felt able to repel an assault from any quarter. But the question of supplies was a serious one. When the siege commenced, there was in the Commissary Department at Knoxville little more than a day's ration for the whole army. Should the enemy gain possession of the south bank of the Holston, our only means of subsistence would be cut off. Thus far his attempts in this direction had failed; and the whole country, from the French Broad to the Holston, was open to our foraging parties. In this way a considerable quantity of corn and wheat was soon collected in Knoxville. Bread, made from a mixture of meal and flour, was issued to the men, but only in half and quarter rations. Occasionally a small quantity of fresh pork was also issued. Neither sugar nor coffee was issued after the first days of the siege. The enemy, foiled in his attempts to seize the south bank of the Holston, now commenced the construction of a raft at Boyd's Ferry. Floating this down the swift current of the stream, he hoped to carry away our pontoon, and thus cut off our communication with the country beyond. To thwart this plan, an iron cable, one thousand feet in length, was stretched across the river above the bridge. This was done under the direction of Captain Poe. Afterwards, a boom of logs, fastened end to end by chains, was constructed still farther up the river. The boom was fifteen hundred feet in length. On the evening of the 23d the Rebels made an attack on our pickets in front of the left of the Second Division, Ninth Corps. In falling back, our men fired the buildings on the ground abandoned, lest they should become a shelter for the enemy's sharpshooters. Among the buildings thus destroyed were the arsenal and machine-shops near the depot. The light of the blazing buildings illuminated the whole town. The next day the Twenty-first Massachusetts and another picked regiment, the whole under the command of Lieutenant-Colonel Hawkes of the Twenty-first, drove back the Rebels at this point, and reoccupied our old position. The same day an attack was made by the Second Michigan on the advanced parallel, which the enemy had so constructed as to envelop the northwest bastion of Fort Sanders. The works were gallantly carried; but before the supporting columns could come up, our men were repulsed by fresh troops which the enemy had at hand. On the 25th of November the enemy, having on the day previous crossed the Holston at a point below us, made another unsuccessful attempt to occupy the heights opposite Knoxville. He succeeded, however, in planting a battery on a knob about one hundred and fifty feet above the river, and twenty-five hundred yards south of Fort Sanders. This position commanded Fort Sanders, so that it now became necessary to defilade the fort.