...oncealed from bodies of the enemy, that would be able to resist it, you are desired to cross the Potomac above Williamsport, leave Hagerstown and Greencastle on your right, and proceed to the rear of Chambersburg , and endeavor to destroy the railroad bridge over the branch of the Concocheague. Any other damage that you can inflict upon the enemy, or his means of transportation, you will also execute. Yo...