On the night of Bach's arrival Frederick was taking part in a concert at his palace, and, on hearing that the great musician whose name was in the mouths of all Germany had come, immediately sent for him without allowing him to don a court dress, interrupting his concert with the enthusiastic announcement, "Gentlemen, Bach is here." The cordial hospitality and admiration of Frederick was gratefully acknowledged by Bach, who dedicated to him a three-part fugue on a theme composed by the king, known under the name of "A Musical Offering." But he could not be persuaded to remain long from his Leipsic home. Shortly before Bach's death, he was seized with blindness, brought on by incessant labor; and his end was supposed to have been hastened by the severe inflammation consequent on two operations performed by an English oculist. He departed this life July 30, 1750, and was buried in St. John's churchyard, universally mourned by musical Germany, though his real title to exceptional greatness was not to be read until the next generation. III. Sebastian Bach was not only the descendant of a widely-known musical family, but was himself the direct ancestor of about sixty of the best-known organists and church composers of Germany. As a master of organ-playing, tradition tells us that no one has been his equal, with the possible exception of Handel. He was also an able performer on various stringed instruments, and his preference for the clavichord * led him to write a method for that instrument, which has been the basis of all succeeding methods for the piano. Bach's teachings and influence may be said to have educated a large number of excellent composers and organ and piano players, among whom were Emanuel Bach, Cramer, Hummel, and Clementi; and on his school of theory and practice the best results in music have been built. * An old instrument which may be called the nearest prototype of the modern square piano.