"'You can hire a domino in the cloakroom, Mr. Calladine,' he said to me. I had already begun to regret the impulse which had brought me, and I welcomed the excuse with which the absence of a costume provided me. I was, indeed, turning back to the door, when a girl who had at that moment run down from the stairs of the hotel into the lounge, cried gaily: 'That's not necessary'; and at the same moment she flung to me a long scarlet cloak which she had been wearing over her own dress. She was young, fair, rather tall, slim, and very pretty; her hair was drawn back from her face with a ribbon, and rippled down her shoulders in heavy curls; and she was dressed in a satin coat and knee-breeches of pale green and gold, with a white waistcoat and silk stockings and scarlet heels to her satin shoes. She was as straight-limbed as a boy, and exquisite like a figure in Dresden china. I caught the cloak and turned to thank her. But she did not wait. With a laugh she ran down the stairs a supple and shining figure, and was lost in the throng at the doorway of the ballroom. I was stirred by the prospect of an adventure. I ran down after her. She was standing just inside the room alone, and she was gazing at the scene with parted lips and dancing eyes. She laughed again as she saw the cloak about my shoulders, a delicious gurgle of amusement, and I said to her: "'May I dance with you?' "'Oh, do!' she cried, with a little jump, and clasping her hands. She was of a high and joyous spirit and not difficult in the matter of an introduction. 'This gentleman will do very well to present us,' she said, leading me in front of a bust of the God Pan which stood in a niche of the wall. 'I am, as you see, straight out of an opera. My name is Celymène or anything with an eighteenth century sound to it. You are--what you will. For this evening we are friends.' "'And for to-morrow?' I asked. "'I will tell you about that later on,' she replied, and she began to dance with a light step and a passion in her dancing which earned me many an envious glance from the other men. I was in luck, for Celymène knew no one, and though, of course, I saw the faces of a great many people whom I remembered, I kept them all at a distance. We had been dancing for about half an hour when the first queerish thing happened. She stopped suddenly in the midst of a sentence with a little gasp. I spoke to her, but she did not hear. She was gazing past me, her eyes wide open, and such a rapt look upon her face as I had never seen. She was lost in a miraculous vision. I followed the direction of her eyes and, to my astonishment, I saw nothing more than a stout, short, middle-aged woman, egregiously over-dressed as Marie Antoinette.