Fritz went in the royal carriage, with suitable escort, to meet the young marquis on the Prussian frontier, as he came to his bridals. They returned together in the carriage to Potsdam with great military display. The wedding took place on the 30th of May, 1729. It was very magnificent. Fritz was conspicuous on the occasion in a grand review of the giant grenadiers. Wilhelmina, in her journal, speaks quite contemptuously of her new brother-in-law, the Marquis of Anspach, describing him as a foolish young fellow. It was, indeed, a marriage of children. The bridegroom was a sickly, peevish, undeveloped boy of seventeen; and the bride was a self-willed and ungoverned little beauty of fifteen. The marriage proved a very unhappy one. There was no harmony between them. Frederick writes: “They hate one another like the fire” (_comme le feu_). They, however, lived together in incessant petty quarrelings for thirty years. Probably during all that time neither one of them saw a happy day. Fritz had now attained eighteen years of age, and Wilhelmina twenty-one. Fritz was very fond of music, particularly of his flute, upon which he played exquisitely, being, however, careful never to sound its notes within hearing of his father. A celebrated music-master from Dresden, by the name of Quantz, was his teacher. He came occasionally from Dresden and spent a week or two at Potsdam, secretly teaching the young prince. The mother of Fritz was in warm sympathy with her son, and aided him in all ways in her power in this gratification. Still it was a very hazardous measure. The fierce old king was quite uncertain in his movements. He might at any hour appear at Potsdam, and no one could tell to what lengths, in case of a discovery, he might go in the intensity of his rage. Fritz had an intimate friend in the army, a young man of about his own age, one Lieutenant Katte, who, when Fritz was with his music-teacher, was stationed on the look-out, that he might give instant warning in case there were any indications of the king’s approach. His mother also was prepared, when Quantz was at Potsdam, promptly to dispatch a messenger to her son in case she suspected his father of being about to turn his steps in that direction.