...his satisfied me that the place was not undefended. I knew that troops had arrived from Grant's army, for prisoners had been captured from Rickett's division of the 6th corps at Monocacy. From Sharpsburg I had sent a message to Mosby, by one of his men, requesting him to cross the Potomac below Harper's Ferry, cut the railroad and telegraph, and endeavor to find out the condition of things in Washing...