But what means this wild laughter which echoes suddenly through the vast crowd and reaches the ear of the king, who looks up surprised and questioning to his master of ceremonies, and orders him to investigate the tumult?  In a few moments Pollnitz returned, accompanied by a young officer, whose tall and graceful figure, and whose handsome face, glowing with youth, pride, and energy, attracted the attention of the noblest ladies, and won a smile of admiration from the queen-mother.

“Sire,” said Pollnitz, “a mask in the guise of a thief, and in the zealous pursuit of his calling, has robbed one of the officers who were commanded by your majesty to guard the public peace and property.  Look, your majesty, at our young lieutenant, Von Trenck:  in the midst of the crowd, his rich, gold-embroidered scarf has been adroitly removed; in his zeal for your service, he forgot himself, and the merry gnome,—­whom Trenck should have kept in order, has made our officer the target for his sleight of hand.  This jest, sire, caused the loud laughter which you heard.”

The eyes of the king rested with an expression of kindliness and admiration upon the young man, and the Princess Amelia felt her heart tremble with joy and hope.  A rich crimson suffused her cheeks; it made her almost happy to see that her lover was appreciated by her exalted brother and king.

“I have watched and wondered at him during the whole evening,” said the king, merrily; “his glance, like the eye of Providence, pierces the most distant and most obscure corner, and sees all that occurs.  That he who sees all else has forgotten himself, proves that he is not vain, and that he forgets his own interests in the discharge of his public duties.  I will remember this and reward him, not in the gay saloon, but on the battle-field, where, I am sure, his scarf will not be taken from him.”

Frederick gave his hand to the young officer, who pressed it warmly to his lips; then turning to the queen-mother, he said:  “Madame, I know that this young man has been commended to you, allow me also to bespeak your favor in his behalf; will your majesty have the grace to instruct him in all the qualities which should adorn a noble cavalier?  I will make him a warrior, and then we shall possess a nobleman beyond praise, if not beyond comparison.”

The king, rising from the table, left his seat and laid his hand kindly upon Trenck’s shoulder.  “He is tall enough,” said Frederick laughing; “for that he may thank Providence; let him not be satisfied with that, but strive to be great, and for that he may thank himself.”  He nodded graciously to Trenck, gave his arm to the queen-mother, and led her into the ball-room.

CHAPTER IV.

Behind the curtain.

The crowd and heat of the dancing-saloon were intolerable.  All wished to see the quadrille in which the two princesses, the loveliest women of the court, and the most gallant cavaliers were to appear.  The music also was a special object of interest, as it was composed by the king.  The first quadrille closed in the midst of tumultuous applause, restrained by no courtly etiquette.  The partners for the second quadrille advanced to the gay and inspiring sound of pipes and drums.