Rienzi, Tuesday, Sept. 16. We were aroused this morning with the same story of march and ordered to cook three days’ rations and be ready to march at 1 P. M., but did not go and all quieted down again. The 3rd Section went out in the afternoon and stationed itself at bastion No. 5 at 9 P. M. Dispatches were brought around to the effect that McClellan had captured the rebel army of Virginia including General Lee. Nothing could induce us to restrain our joy but the fear of its being false.