The Voynich manuscript has long puzzled and fascinated ... He also recommended the use of "secret letters" (such as a cipher, secret alphabet, or similar) to obscure medical recipes and procedures ...

This book, named the Voynich Manuscript after him, has never been deciphered by ... Two hundred forty vellum pages filled with writing in an unknown alphabet and puzzling illustrations of unidentified ...

31-32 of The Voynich Manuscript (ed. Raymond Clemens), and ... an inscription naming a 16th-century alchemist in Prague, a roman alphabet in a margin, and what look like attempts to draw ...