'Do you know if the Landhofmeisterin left the ballroom during the last evening?' he asked Zollern.

No; the old Prince had observed her Excellency constantly, and she had not been absent from the dancing-hall, save for a few moments which she passed on one of the balconies in the company of a black domino, whose identity Monseigneur de Zollern had been unable to ascertain. Serenissimus dismissed his suspicions with relief. It is pain to doubt those we love.

Zollern took his leave, and the Duke desired the Secret Service officer to retire. He would ask her Excellency's advice in private. The Landhofmeisterin was summoned to attend his Highness on important business. After some little delay she arrived. Passing up the grand stairs, she was ceremoniously ushered into his Highness's presence.

His suspicion, though dismissed, rankled. Serenissimus greeted her coldly, and informed her of the letter's disappearance.

'Your Highness refers to a letter which I was not permitted to peruse? I regret that it should be lost, but you will remember that you considered it to be unimportant.'

The relationship between the lovers was strained.

'I do not discuss the importance of the document, Madame. Indeed, the smallest scrap of paper missing from my bureau would be a grave matter to me, as I should thus ascertain that some person had access to my private papers.'

The Duke spoke with cold displeasure. He had felt a pang of jealous suspicion when Zollern informed him of Wilhelmine's interview with the black domino; also, he was still angry with his mistress for her stormy exit after his refusal to show her Forstner's letter; and further, he was greatly incensed at the plot to force him to abdicate. All these causes wrought an iron firmness into his usually gentle voice. Wilhelmine felt this to be a crucial moment in her life.

'It would appear that your Highness sees fit to question me in a strange manner upon this trivial matter! I am not aware that the Landhofmeisterin's office is concerned with the superintendence of your Highness's private bureau,' she said haughtily.

'You know my meaning perfectly, Wilhelmine,' the Duke broke out furiously. 'Alas! like a pack of cards built in a card-house, my happiness, my pride, my triumph, my joy in my new palace, come falling about my head! How sad, how futile a thing is earthly joy!' He turned away, and bent to stroke Mélac's head. The good beast had approached in seeming anxiety upon hearing the Duke's distressed voice.