Voynichese is a numeric cipher?

[ololololo]

I think you nearly had it, it was just the bug in the gemini garbling a couple of things.

Phrase 1 (with /// marks):
IF YOU HAPPEN TO HAVE READ ANOTHER BOOK ABOUT CHRISTOPHER ROBIN YOU MAY REMEMBER THAT HE ONCE HAD A SWAN

Phrase 2 (no marks):
ONE DAY WHEN HE WAS OUT WALKING HE CAME TO AN OPEN PLACE IN THE MIDDLE OF THE FOREST

Thanks a lot again! Well, in general, this means that these anagrams are not that difficult to solve.