...he Federal President in positive language that he did not approve the movement on Johnston's position at Centreville, but preferred to take his army down the Potomac River into Chesapeake Bay, up the Rappahannock River , and form a base of operations at a place called Urbana; or, better still, continue down Chesapeake Bay and around to Fort Monroe, using that formidable fort as a base, and advance on Richmond from t...