Young Keith managed to spoil all.  Instead of waking the prince, he called his valet, who was really a spy of the king’s, and who, suspecting something to be amiss, pretended to fall asleep again, while heedfully watching.  Frederick soon after awoke, put on a coat of French cut instead of his uniform, and went out.  The valet immediately roused several officers of the king’s suite, and told them his suspicions.  Much disturbed, they hurried after the prince.

After searching through the village, they found him at the horse-market leaning against a cart.  His dress added to their suspicions, and they asked him respectfully what he was doing there.  He answered sharply, angry at being discovered.

“For God’s sake, change your coat!” exclaimed Colonel Rochow.  “The king is awake, and will start in half an hour.  What would be the consequence if he were to see you in this dress?”

“I promise you that I will be ready before the king,” said Frederick.  “I only mean to take a little turn.”

While they were arguing, the page arrived with the horses.  The prince seized the bridle of one of them, and would have leaped upon it but for the interference of those around him, who forced him to return to the barn in which the royal party had found its only accommodation for that night.  Here he was obliged to put on his uniform, and to restrain his anger.

During the day the valet and others informed the king of what had occurred.  He said nothing, as there were no proofs of the prince’s purpose.  That night they reached Frankfort.  Here the king received, the next morning, the letter sent him by Katte’s cousin.  He showed it to two of his officers, and bade them on peril of their heads to keep a close watch on the prince, and to take him immediately to the yacht on which the party proposed to travel the next day by water to Wesel.

The king embarked the next morning, and as soon as he saw the prince his smothered rage burst into fury.  He grasped him violently by the collar, tore his hair out by the roots, and struck him in the face with the knob of his stick till the blood ran.  Only by the interference of the two officers was the unhappy youth saved from more extreme violence.

His sword was taken from him, his effects were seized by the king, and his papers burned by his valet before his face,—­in which he did all concerned “an important service.”

At the request of his keepers the prince was taken to another yacht.  On reaching the bridge of boats at the entrance to Wesel, he begged permission to land there, so that he might not be known.  His keepers acceded, but he was no sooner on land than he ran off at full speed.  He was stopped by a guard, whom the king had sent to meet him, and was conducted to the town-house.  Not a word was said to the king about this attempt at flight.

The next day Frederick was brought before his father, who was in a raging passion.