Those signatures are affixed to be repudiated.
I say that Freistner has been a prisoner for weeks, and I deny that Fenn has received a single communication from him during that time.
Fenn asserts that he has, but has destroyed them.

I repeat that he is a liar." "That's plain speaking," Cross declared.

"Now, then, Fenn, lad, what have you to say about it ?" Fenn leaned forward, his face distorted with something which might have been anger, but which seemed more closely to resemble fear.
"This is just part of the ratting!" he exclaimed.

"I never keep a communication from Freistner.

I have told you so before.