"no other document written in Voynichese script has been found up to date" ?
I'd agree with that one.
Also I know I'm going off topic here, but in response to the above, if we did find a single manuscript, pre-1400's, which was a collection of scripts like JKP and Diane suggest, in which all Voynich glyphs were found, but across several scripts... I think that would be highly interesting.
The Voynich script didn't happen out of thin air. The Voynich author may have owned such a book which offered him a collection of scripts from which to cherry-pick glyphs to create his Voynichese.
I'd agree with that one.
Also I know I'm going off topic here, but in response to the above, if we did find a single manuscript, pre-1400's, which was a collection of scripts like JKP and Diane suggest, in which all Voynich glyphs were found, but across several scripts... I think that would be highly interesting.
The Voynich script didn't happen out of thin air. The Voynich author may have owned such a book which offered him a collection of scripts from which to cherry-pick glyphs to create his Voynichese.