There is not much to go on here yet, but with a bit from his citizenship papers from London one sees oddities. If you have any additional penned writings from Wilfrid Voynich please post them here at.
I believe that Wilfrid Voynich forged the Voynich Manuscript. Here are some profound similarities from the script to his signature.
Comparison of penmanship:
Marci letter penned by Voynich:
The Voynich Signature follows a downward slope and the letter spacing looks similiar.