As soon as he returned home, he called for his private secretary, who was one of the most dexterous detectives in Vienna.

"You will make inquiries at once as to the whereabout of the prima donna who sang before me and their majesties to-night. Tomorrow at nine o'clock I must know who she is, where she lodges, and what is her business here."

CHAPTER, LXII.

FREDERICK THE GREAT AND PRINCE KAUNITZ.

The great review, which had been gotten up in honor of the King of Prussia, was over. In this review Frederick had become acquainted with the strength of the Austrian army, the superiority of its cavalry, and the military capacity of the emperor who was its commander-in-chief.

The king had been loud in his praises of all three, and had embraced the emperor in presence of the whole army.

Immediately after the review, Frederick sent a page to announce to Prince Kaunitz that he woud be glad to see him in his own private apartments.

Kaunitz at once declared his readiness to wait upon the king, and to the unspeakable astonishment of his valet, had actually shortened his toilet and had betrayed some indifference to the arrangement of his peruke. As he left the room, his gait was elastic and active, and his countenance bore visible marks of the excitement with which he was looking forward to the coming interview.

But Kaunitz himself became suddenly aware of all this, and he set to work to force back his emotion. The nearer he came to the king's suite of rooms, the slower became his step and the calmer his mien. At last it was tranquillized, and the minister looked almost as cold and indifferent as ever.

Arrived at the door of the antechamber, he looked around, and having convinced himself that no one was in sight, he drew from his breast-pocket a small mirror which he always wore about his person. Sharply he viewed himself therein, until gradually, as he looked, his face resumed the stony aspect which like a thickening haze concealed his emotions from other men's eyes.