... scouts lead you to suppose that your movement can be concealed 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 Concocheaque. Any other damage that you can Inflict upon the enemy or...