three o’clock
But so strongly was every place held , and so numerous had become the Federal cavalry , it was impossible to make any large capture . The enemy had learned by bitter experience , that eternal vigilance was their only safety in guarding against Morgan , and the troops which held the left of Rosecrans 's army were always in fear . No Federal soldier was safe half a mile outside the lines . Bitterly did many sleepy soldiers curse him , for at three o'clock every morning they were forced to get up and stand at arms until broad daylight . The Federal officers wanted no more surprises . But in spite of all their vigilance , Morgan would swoop down and carry off prisoners from under their very noses . These months were busy ones for Calhoun ; he and his scouts were always on the go .