... to a rebel picket-guard, and was captured. McClellan waited all day in vain for the rear attack to begin; for when the engagement on the mountain was over, the day was already so far advanced, and Rosecrans ' men were so thoroughly worn out with their toilsome ascent preceding the fight, that it was deemed most prudent to go into bivouac on the field of battle. McClellan was not informed of the fight a...