...y miles north of Richmond, marched northward last night. So it is his determination to cross the Rappahannock? Or is it a demonstration of the enemy to prevent him from sending reinforcements to North Carolina ? We shall know speedily. North Carolina, one would think, is soon to be the scene of carnage; and it is asked what can 16,000 men do against 60,000? The enemy began the attack on Fort Cas...