The Book Switch Theory

[ReneZ]

Sorry, I was referring to this entry in your table:

• Miscellanea | c.m.s.XV / Census 1846 DR II p.1846 | J31
  
  
• (The estate of [...] Voynich [...], Ms. 8)
  
  
• Almost certainly 'the' Voynich MS
  
  

Why was this entry so vague, when all the others were quite explicit?  If the author of that entry was aware of the connection to Marci's letter, why did he list the book as "s.XV" instead of "s.XIII" (as per Raphael's Bacon guess) or "s.XVII" (the only firm date implied by the letter?  

Ughhh. A long and detailed response lost by an unfortunate key press and no 'editor saved draft'.
I'll sit down and write it again :-(