...ld saw-mill, and floated his mountain howitzer over, towing it by our picket-ropes. Every body was in a good humor, and had lots of fun over our gunboat, as the boys called the raft. He had sent Colonel Munroe (One Hundred and Twenty-third Illinois) with his regiment to destroy the railroad bridge over Elk River in the rear of Tullahoma, but Withers's division of infantry got there three hundred yards ahea...