It was said of the Roman Empire under the Caesars that the whole world was only one great prison for Caesar, for if any man offended the emperor it was impossible for him to escape. If he crossed the Alps, could not Caesar find him out in Gaul? If he sought to hide himself in the Indies, even the swarthy monarchs there knew the power of the Roman arms, so that they could give no shelter to a man who had incurred imperial vengeance. And yet, perhaps, a fugitive from Rome might have