'Yes, I tell you,' was his answer; 'and I want the portfolio containing his letters.'
Hardly able to walk, the queen went to fetch the portfolio, which the king slashed in pieces and took out the letters. Then, without another word, he walked away.
'Have you heard? Fritz is dead!' said the queen to Wilhelmine, in a terrible voice that seemed dead also. The princess fainted at the horrible news, but when she recovered her senses, madame von Sonsfeld whispered not to be afraid, as she had reason to know that the prince, though strictly guarded, was alive and well. These words put fresh life into the hearts of his mother and sister, and enabled Wilhelmine to bear the blows and kicks which her father showered upon her, till he was dragged off by his other children. Then he confessed that Fritz was still living, and accused Wilhelmine of having been his accomplice in an act of high treason against the king's person. This was more than the poor girl could bear.
'I will marry anyone you like,' she cried, 'if you will only spare my brother's life—the duke of Weissenfeld, or anybody else; it is all the same to me.' But the king was deaf to everything but the sound of his own voice, and did not hear her, and a moment after Katte, pale and calm, passed the window, under the guard of four soldiers, for his examination by the king.
Frederick William behaved with his usual brutality, even kicking the unhappy prisoner, who threw himself at his feet, confessing his own part in the plot, but denying that Wilhelmine had any part in it. He acknowledged, however, that by the prince's orders he had sent the letters to her, and these were closely examined by the minister Grumkow, 'in the hope,' says Wilhelmine, 'of finding something that would condemn us.' But the closest scrutiny revealed nothing of the least importance, though the king was still suspicious, and commanded the princess to keep her room till he had time to question her further.
Meanwhile the crown prince was locked up in the fortress of Cüstrin, and obliged to obey a set of those minute rules which Frederick William loved to draw up. 'Every morning at eight a basin and a little water, to wash himself with, is to be taken to his cell by a scullion'; and this seems to have been the only washing allowed him by the king, who is always reproaching him for his dirty habits. Two meals, one at twelve and the other at six, were all he was allowed, and 'his food is to be cut up before he has it.' Several times a day he was visited by the officers in charge, but they were strictly forbidden to speak to him. By-and-bye the king declared that the prisoner had forfeited his right to the Prussian crown, and ordered him to be spoken of as 'colonel Frederick.'
At last a council was appointed to try both the prince and Katte, and Keith—if they could get him! The trial was long, and at the end of it Katte was condemned to death for intended desertion, but strongly recommended to mercy. With regard to the prince they considered that, as he had been deprived of his military rank and suffered many months of close imprisonment, he was sufficiently punished, especially as he had expressed his willingness 'to do all that His Majesty requires or commands.' Touching the charge of disobedience, the council declined to pass judgment.
The recommendation to mercy was not heeded. Katte's grandfather, field marshal von Alvensleben, wrote a touching letter begging for his life, and recalling the many occasions on which he himself had risked his own in the service of Prussia. He received a reply stating that Katte deserved 'to be torn with red-hot pincers,' as was the law in Prussia, 'but that, "out of consideration" for his father and grandfather, his head should be cut off.' This document is signed 'Your very affectionate king.' Probably nothing that Frederick the Great ever endured in his whole life was as bitter as the scene which his father had prepared for him. Katte was to be beheaded under the windows of the crown prince's prison. If the span was too narrow, another place was to be chosen, 'but so that the prince can see well.' For this purpose the condemned man was to take a two days' journey to Cüstrin, but, perhaps by the mercy of his gaolers, Frederick was told nothing till he was awakened at five o'clock on the morning of November 6, and informed that Katte had been in Cüstrin since the previous day, and was to be executed at seven. The unexpected news upset the prince completely. He wept and wrung his hands, and begged that the execution might be delayed till he could send a courier to the king at Wustershausen. He offered to resign the crown, to suffer perpetual imprisonment, even to sacrifice his own life, if only he might save that of Katte. The officers were full of pity, but they were powerless.
Gently but firmly he was at length forced to the window beneath which the block stood, between the prison and the river Oder. Then Katte appeared, a minister on each side of him, holding his hat under his arm. As he passed the window he looked up, and Frederick flung himself across the bars, crying 'Katte! Katte! forgive me.'