There was nothing for him to do but to yield to the Romans.  He came into the camp in mourning, and Æmilius gave him his hand and received him kindly, but kept him a prisoner, and formed Macedon into a province under Roman government.  Æmilius himself went on a journey through the most famous Greek cities, especially admiring Athens, and looking at the places made famous by historians, poets, and philosophers.  He took Polybius, a learned Athenian philosopher, who wrote the history of this war, to act as tutor to his two sons, though both were young men able to fight in this campaign, and from that time forward the Romans were glad to have Greek teachers for their sons, and Greek was spoken by them as freely and easily as their own Latin; every well-educated man knew the chief Greek poets by heart, and was of some school of philosophy, either Stoic or Epicurean, but the best men were generally Stoics.