'How beautiful you are—how beautiful——!' the black mask whispered.

'Tell me who you are,' she said, and smiled at him.

'An enemy who would turn friend, and more—if he looked too long at you,' he answered slowly.

'Tell me your name,' she asked once more.

'No; my name you will never know, only I have warned you.'

'I thank you,' she said gravely, and gave him her hand. He bent and kissed it, and vanished into the shadow of the garden. She stood a moment looking after her unknown visitor. Ruin and death, he had said. She pondered on why this stranger should have warned her. Evidently an enemy with an evil plan against her, turned aside by some man's whim, some sudden mood caused by the sight of her beauty. Flight, he counselled, flight for her! No! she would battle to the last, but she would not neglect the unknown's warning. In a flash it came to her that this man was connected with the letter which the Duke had refused to communicate to her. She replaced her mask and returned to the ballroom. Still the same monotonous whirling crowd, the pattering feet of the dancers, the din of the music.

She searched for Serenissimus. He was standing with a group of masks at the lower end of the hall, and did not observe her. She made her way slowly through the crowd to the other side of the room, and slipped through the door into the ante-hall. Immediately two lackeys sprang forward to inquire her Excellency's pleasure. She waved them away and passed onward, out to the terrace, and towards her pavilion. The sentry at her door saluted her, but she gained her own ante-hall without meeting any of her waiting men, even Maria was gaping in the crowd in the courtyard probably.

Wilhelmine paused a moment in her antechamber on the first floor. She listened attentively, and called Maria under her breath, but no answer came. Then she drew out the little key, approached the door leading to the statue gallery and opened it gently. The gallery was in darkness, save where a faint white radiance was reflected from the moonlit garden without, but that side of the palace lay in deep shadow. She crept on and groped for the lock beneath the plaster Amorino's hand. At first she could not find it, but after some moments she felt the tiny keyhole, and, fitting the key, she turned it and the door swung open. She glided in behind the arras, and found the spring which opened the partition. She listened; there was no sound from the room within. She pressed the spring, the tapestry door opened silently beneath her touch, and she passed into the Duke's writing-closet. Here the moon shone full in, white and ghostly. Wilhelmine's mind flew back to that far-off night at Güstrow, when in the moonlight she had stolen the key from under her mother's pillow. How she had trembled! She had been a child in experience then, a very different being from the strong, self-confident woman she knew herself to be nowadays. And yet she trembled in the moonlit room as she had trembled then. What was that? The moonlight falling in sheeny silver through the window, seemed to her to take the shape of a tall, white woman's figure. She remembered the grim old legend of that Countess of Orlamünde, murderess of little children, who haunted all the palaces of her descendants. In the castle at Stuttgart, they said, the White Lady walked, her pale trailing garments streaked with blood. Could she wander here too in new, gorgeous Ludwigsburg? Almost Wilhelmine turned and fled, but the remembrance of her dire peril came to her. She looked bravely at the moonlight—there was no ghost there; it was only the Lady Moon, witch of the night, throwing her cold, false smiles through the casement. Wilhelmine went forward boldly. She must find the letter at any cost; its contents threatened her, and she must know.

The Duke's bureau was locked. She pressed the secret spring in vain. Was she doomed to be baffled, after all? She remembered that her own bureau was identical with his Highness's. Resolutely, with that patience which is born of hazardous undertakings, she glided away through the arras door, through the black gallery, and regained her apartments. She heard a movement in her sleeping-room, and Maria came to her.

'Your Excellency, pray forgive that I was not here.'