... garrisons to Harper's Ferry, but these orders were not obeyed, and on the thirteenth Winchester was attacked, and its armament and a part of the garrison captured. Lee now crossed the Potomac near Williamsport , and directed his march upon Harrisburgh. General Hooker followed on his right flank, covering Washington and Baltimore. On reaching Frederick, Md., on the twenty-eighth June, he was, at his own ...