...d not make an attack upon Washington sooner than a week after it had started.--Look, then, what immense preparations such an undertaking must devolve upon our authorities!--20,000 men must be left at Fairfax and Manassas, and 80,000 would be required for the march, of which 20,000 could act as a rear guard in Maryland, to hold off the Yankee reinforcements, while 60,000 investigated once more the bravery...