He shall do you no harm

    "Don't kill me, massa!" pleaded Caesar in tones of piteous entreaty.     "I don't know," answered Fred. "That depends on yourself. If you obey us strictly we will spare you."     "Try me, massa!"     "You black hound!" said Roderick hoarsely. "If I were not disabled I'd kill you myself."     Here was a new danger for poor Caesar, for he knew Roderick's fierce temper.     "Don't let him kill me!" he exclaimed, affrighted.     "He shall do you no harm. Will you obey me?"     "Tell me what you want, massa."     "Is the boy these men captured inside?"     "Yes, massa."     "Open the cave, then. We want him."     "Don't do it," said Roderick, but Caesar saw at a glance that his old master, of whom he stood in wholesome fear, was unable to harm him, and he proceeded to unlock the door.     "Go and call the boy!" said Fred.     Caesar disappeared within the cavern, and soon emerged with Rodney following him.     "Are you unhurt?" asked Fred anxiously.     "Yes, and overjoyed to see you. How came you here?"     "We followed the nigger from Oreville."