As usual, Frederick wrote a poem upon the occasion. It was vulgar and profane. Carlyle says of it, The author, with a wild burst of spiritual enthusiasm, sings the charms of the rearward part of certain men. He rises to the height of anti-biblical profanity, quoting Moses on the Hill of Vision; sinks to the bottomless of human or ultra-human depravity, quoting King Nicomedess experience on C?sar, happily known only to the learned. A most cynical, profane affair; yet we must say, by way of parenthesis, one which gives no countenance to Voltaires atrocities of rumor about Frederick himself in the matter.111A miserable Bishop of Liege thought it a proud thing to insult the late king. Some subjects of Herstal, which belongs to Prussia, had revolted. The bishop gave them his protection. Colonel Kreutzen was sent to Liege to compose the thing by treaty, with credentials and full power. Imagine it; the bishop would not receive him! Three days, day after day, he saw this envoy apply at his palace, and always denied him entrance. These things had grown past endurance.
The captive Crown Prince was conveyed from Wesel to the castle of Mittenwalde, where he was imprisoned in a room without furniture or bed. An old chest which chanced to be there was his only seat. One of the kings favorite ministers, Grumkow, with other officials, was sent to interrogate him. The prince, probably aware that nothing which he could now do could make matters worse than they actually were, displayed much spirit in the interview. Frankly avowing his intention to escape, he refused to make any disclosures which should implicate his friends. Grumkow insolently informed him that the101 use of the rack was not yet abolished in his majestys dominions, and that, if he were not more pliant, the energies of that instrument might be called into requisition. Frederick admitted afterward that his blood ran cold at that suggestion. Still he had the nerve to reply, according to the testimony of Wilhelmina,The king had a logical mind. He could keenly feel where the argument pinched. He seemed quite troubled. After a moments pause, he said, Well, I will do it. Then, turning to the queen, he said, You, Phiekin, may write to your brother, after I am dead, and tell him that I forgave him, and died at peace with him.