He often spent much time at the clavier, picking out thirds, which he was ever striking, and his pleasure showed that it sounded good... In the fourth year of his age his father, for a game as it were, began to teach him a few minuets and pieces at the clavier... He could play it faultlessly and with the greatest delicacy, and keeping exactly in time... At the age of five, he was already composing little pieces, which he played to his father who wrote them down.