The next picture shows us Sebastian Bach, "the father of all music," playing before Frederick the Great. The painter has chosen the moment when the King is giving Bach a theme on which to improvise. This theme, "a right royal one," as Bach called it, was afterwards worked out by him and sent back to the King, under the name of "A Musical Sacrifice." The King, who was himself a remarkable musician, had shown Bach the greatest appreciation, and this visit to Potsdam seems to have been one of the happiest events in Bach's life. Those who are inclined to regard Frederick, in his musical capacity, as no better than a _dilettante_ flute-player would do well to remember that he was among the first to recognise and to encourage the genius of one of the greatest musicians of all time. Yet Bach's greater works remained in manuscript, and it was left to musicians of a later period--especially to Mendelssohn--to unearth and make them known to the world at large. [Illustration: "FREDERICK THE GREAT AND SEBASTIAN BACH." FROM THE PICTURE BY CARL RÖHLING. By permission of the Berlin Photographic Company, 133, New Bond Street, London, W. _Copyright, 1901, by Photographische Gesellschaft._] Another of our master-musicians, Haydn, unlike Bach, who never left his country, came to England, and reached in this country the summit of his renown. In the picture on the next page we see him on board ship. Well wrapped in his great-coat he stands on deck and seems to enjoy the sea-breezes, unconscious of the curiosity of the other passengers. He is wondering what will await him in that strange country across the sea. Will they understand him and the message he has to deliver to them: harmonies so pure and simple from a heart so kindly and a will so strong? And they did understand him in England; a glorious season of success awaited him. Sympathy met him everywhere, and in such fulness that on returning home to Austria he stopped at the little village of his birth and, kneeling at the threshold of his father's humble cottage, he thanked God for all the happiness which he had known in England. [Illustration: "HAYDN CROSSING TO ENGLAND." FROM THE PICTURE BY CARL RÖHLING. By permission of the Berlin Photographic Company, 133, New Bond Street, London, W. _Copyright, 1902, by Photographische Gesellschaft._]