JUNE 18TH.—The city is content at the evacuation. The people have unbounded confidence in the wisdom of the administration, and the ability of our generals. Beauregard is the especial favorite. The soldiers, now arming daily, are eager for the fray; and it is understood a great battle must come off before many weeks; as it is the determination of the enemy to advance from the vicinity of Washington, where they are rapidly concentrating. But our people must curb their impatience. And yet we dare not make known the condition of the army,—the awful fact which may be stated here—and will not be known until after-years,—that we have not enough ammunition at Manassas to fight a battle. There are not percussion caps enough in our army for a serious skirmish. It will be obviated in a few weeks; and until then I pray there may be no battle. But if the enemy advance, our brave men will give them the cold steel. We must win the first battle at all hazards, and at any cost; and, after that,—how long after? —we must win the last!