SEPTEMBER 24TH.—The time is up for the departure of alien enemies. This is the last day, according to the President’s proclamation. We have had no success lately, and never can have success, while the enemy know all our plans and dispositions. Keep them in total ignorance of our condition and movements, and they will no more invade us than they would explore a vast cave, in which thousands of rattlesnakes can be heard, without lights. Their spies and emissaries here are so many torch-bearers for them.