'That key may bring you luck,' the King went on. 'It opens a golden casket which contains a priceless treasure. But where that is I cannot tell you; you must search for it diligently. If you remain good friends with me, and with Windekind, and are steadfast and true, you may very likely succeed.' The Elfin King nodded his handsome head with hearty kindness, and Johannes thanked him, greatly delighted. Hereupon three frogs, who sat perched on a little cushion of moist moss, began to sing the prelude to a slow waltz, and the couples stood up. Those who did not dance were requested by a green lizard--who acted as master of the ceremonies and who rushed hither and thither very busily--to move into the corners; to the great indignation of the two toads, who complained that they could not see; and then the dancing began. It was very droll at first. Each one danced after his own fashion and naturally imagined that he did it better than any one else. The mice and frogs leaped as high as they could on their hind legs; an old rat spun round so roughly that all the rest had to keep out of his way; and even a fat slug ventured to take a turn with a mole, but soon gave it up, excusing herself by saying that she had a stitch in her side--the real reason was that she could not do it well. However, the dance went on very gravely and ceremoniously. Every one regarded it as a matter of conscience, and glanced anxiously at the King to see some token of approval on his countenance. But the King was afraid of causing jealousies, and looked quite unmoved. His suite thought it beneath them to dance with the rest. Johannes had stood among them quite quietly for a long time; but he saw a little toad waltzing with a tall lizard who sometimes lifted the hapless toad so-high above the ground that she described a semicircle in the air, and his amusement burst out in a hearty laugh. What an excitement it caused! The music ceased. The King looked angrily about him. The master of the ceremonies flew in all haste to implore Johannes to behave less frivolously. 'Dancing is a very serious thing,' said he, 'and certainly no subject for laughter. This is a very distinguished party, where people do not dance for amusement. Every one is doing his best and no one expects to be laughed at. It is extremely rude. Besides, this is a mourning feast, on a very melancholy occasion. You must behave suitably, and not as if you were among men and women.' Johannes was quite alarmed. On every side he met disapproving looks; his intimacy with the King had already made him some enemies. Windekind led him aside. 'We shall do better to go, Johannes,' he whispered. 'You have spoilt it all. Yes, yes; that comes of having been brought up among men.' They hastily slipped out under the wings of the porter bat, into the dark passage. The glow-worm in waiting attended them to the door. 'Have you been amused?' he asked. 'Did King Oberon speak to you?'