Around these vows, which were merely the Ten Commandments expressed in terms which the people of the Middle Ages could understand, there developed a complicated system of manners and outward behaviour. The knights tried to model their own lives after the example of those heroes of Arthur's Round Table and Charlemagne's court of whom the Troubadours had told them and of whom you may read in many delightful books which are enumerated at the end of this volume. They hoped that they might prove as brave as Lancelot and as faithful as Roland. They carried themselves with dignity and they spoke careful and gracious words that they might be known as True Knights, however humble the cut of their coat or the size of their purse. In this way the order of Knighthood became a school of those good manners which are the oil of the social machinery. Chivalry came to mean courtesy and the feudal castle showed the rest of the world what clothes to wear, how to eat, how to ask a lady for a dance and the thousand and one little things of every-day behaviour which help to make life interesting and agreeable. Like all human institutions, Knighthood was doomed to perish as soon as it had outlived its usefulness. The crusades, about which one of the next chapters tells, were followed by a great revival of trade. Cities grew overnight. The townspeople became rich, hired good school teachers and soon were the equals of the knights. The invention of gun-powder deprived the heavily armed "Chevalier" of his former advantage and the use of mercenaries made it impossible to conduct a battle with the delicate niceties of a chess tournament. The knight became superfluous. Soon he became a ridiculous figure, with his devotion to ideals that had no longer any practical value. It was said that the noble Don Quixote de la Mancha had been the last of the true knights. After his death, his trusted sword and his armour were sold to pay his debts. But somehow or other that sword seems to have fallen into the hands of a number of men. Washington carried it during the hopeless days of Valley Forge. It was the only defence of Gordon, when he had refused to desert the people who had been entrusted to his care, and stayed to meet his death in the besieged fortress of Khartoum. And I am not quite sure but that it proved of invaluable strength in winning the Great War. POPE vs. EMPEROR THE STRANGE DOUBLE LOYALTY OF THE PEOPLE OF THE MIDDLE AGES AND HOW IT LED TO ENDLESS QUARRELS BETWEEN THE POPES AND THE HOLY ROMAN EMPERORS IT is very difficult to understand the people of by-gone ages. Your own grandfather, whom you see every day, is a mysterious being who lives in a different world of ideas and clothes and manners. I am now telling you the story of some of your grandfathers who are twenty-five generations removed, and I do not expect you to catch the meaning of what I write without re-reading this chapter a number of times.