After Prince appeared to have learned that lesson quite perfectly, Harry taught him something new.

He taught him to stand on his hind legs and hold a pipe in his mouth.

This he soon did so well that Harry clapped his hands and cried, "Good, good, you smoke as well as his royal highness, the Black Prince, himself."

Which remark showed that Harry had not yet begun to study history. If he had, he would have known that in the country where the Black Prince lived, tobacco was never heard of until many, many, MANY years after his death.
End of Chapter