What else? I think as late as 1732 or even 1733 Fritz was writing "The Empress should give me her daughter rather than her niece," but to whom? Grumbkow?
Grumbkow, and as far as I recall it was but the last of a whole series of such suggestions to Grumbkow, starting with the one which might even have been in late 1731, not 1732, where Fritz woke up his small Küstrin entourage to have them all sign on a letter to Grumbkow suggesting a him/MT match and Grumbkow wrote horrified WTF? letters to both Eugene and to one of the Küstrin guys. I also remember first coming across one of the "Fritz suggests marrying MT to Grumbkow" letters in one of the German editions, possibly the one which also has the letter of Fritz mentioning Katte to Grumbkow (which as I recall wasn't in the French Trier letters) in the context of his ditching Manteuffel.
Hinrichs also in "Der Kronprinzenprozess" has Fritz repeatedly denying ever telling Katte of the Evil Catholic Marriage Plot, remember, and both quotes - from Katte and from Fritz - are really important since this is the one issue where their testimonies diverged.
Nicolai isn't a witness, but he does express - in his refutation of Zimmermann's "Fritz didn't want to escape to England or France, he totally wanted to go to Austria to marry MT!" - the in retrospect insightful opinion that the Katte who wrote such good Protestant Christian last letters would never have signed on to such a project (of Fritz marrying a Catholic Archduchess).
Re: MT marriage AU sources
Grumbkow, and as far as I recall it was but the last of a whole series of such suggestions to Grumbkow, starting with the one which might even have been in late 1731, not 1732, where Fritz woke up his small Küstrin entourage to have them all sign on a letter to Grumbkow suggesting a him/MT match and Grumbkow wrote horrified WTF? letters to both Eugene and to one of the Küstrin guys. I also remember first coming across one of the "Fritz suggests marrying MT to Grumbkow" letters in one of the German editions, possibly the one which also has the letter of Fritz mentioning Katte to Grumbkow (which as I recall wasn't in the French Trier letters) in the context of his ditching Manteuffel.
Hinrichs also in "Der Kronprinzenprozess" has Fritz repeatedly denying ever telling Katte of the Evil Catholic Marriage Plot, remember, and both quotes - from Katte and from Fritz - are really important since this is the one issue where their testimonies diverged.
Nicolai isn't a witness, but he does express - in his refutation of Zimmermann's "Fritz didn't want to escape to England or France, he totally wanted to go to Austria to marry MT!" - the in retrospect insightful opinion that the Katte who wrote such good Protestant Christian last letters would never have signed on to such a project (of Fritz marrying a Catholic Archduchess).