(September 17, 1862.)
Battery K, 5th U.S. Artillery, crossed the Antietam by the Middle Bridge and about 2 P.M., September 17, relieved Battery M, 2d U.S. Artillery, taking position on the ridge immediately north of this point. After the expenditure of 400 rounds of ammunition at 5 P.M., the Battery was relieved in turn, by Battery M. 2d U.S. Artillery, soon after which it recrossed the Antietam.