One might wonder why, after the Norman Conquest, French did not become the national language, replacing English entirely. The reason is that the Conquest was not a national migration, as the earlier Anglo-Saxon invasion had been. Great numbers of Normans came to England, but they came as rulers and landlords. French became the language of the court, the language of the nobility, the language of polite society, the language of literature. But it did not replace English as the language of the people. There must always have been hundreds of towns and villages in which French was never heard except when visitors of high station passed through. The organizational pattern of this passage is ______.