Theories about authorship

Many names have been proposed as possible authors of the Voynich manuscript. Here are only the most popular ones.

Roger Bacon

Marci's 1665 cover letter to Kircher says that, according to his late friend Raphael Mnishovsky, the book had once been bought by Emperor Rudolf II of Bohemia (1552–1612) for 600 ducats — several thousand dollars in today's money. According to the letter, Rudolf (or perhaps Raphael) believed the author to be the Franciscan friar and polymath Roger Bacon (1214–1294).

Even though Marci said that he was "suspending his judgement" about this claim, it was taken quite seriously by Voynich, who did his best to confirm it. His conviction strongly influenced most decipherment attempts for the next 80 years. However, scholars who have looked at the Voynich manuscript and are familiar with Bacon's works have flatly denied that possibility. One should note also that Raphael died in 1644, and the deal must have occurred before Rudolf's abdication in 1611—at least 55 years before Marci's letter.

John Dee

The assumption that Roger Bacon was the author led Voynich to conclude that the person who sold the Voynich manuscript to Rudolf could only be John Dee, a mathematician and astrologer at the court of Queen Elizabeth I, known to have owned a large collection of Bacon's manuscripts. Dee and his scrier (mediumic assistant) Edward Kelley lived in Bohemia for several years where they had hoped to sell their services to the Emperor. However, Dee's meticulously kept diaries do not mention that sale, and make it seem quite unlikely. Anyway, if the Voynich manuscript author is not Bacon, the connection to Dee may just disappear. On the other hand, Dee himself may have written it and spread the rumour that it was originally a work of Bacon's in the hopes of later selling it.

Edward Kelley

Dee's companion in Prague, Edward Kelley, was a self-styled alchemist who claimed to be able to turn copper into gold by means of a secret powder which he had dug out of a Bishop's tomb in Wales. As Dee's scrier, he claimed to be able to invoke angels through a crystal ball, and had long conversations with them—which Dee dutifully noted down. The angel's language was called Enochian, after Enoch, the Biblical father of Methuselah; according to legend, he had been taken on a tour of Heaven by angels, and later written a book about what he saw there. Several people (see below) have suggested that, just as Kelley invented Enochian to dupe Dee, he could have fabricated the Voynich manuscript to swindle the Emperor (who was already paying Kelley for his supposed alchemical expertise). However, if Roger Bacon is not the author of the Voynich manuscript, Kelley's connection to the manuscript is just as vacuous as Dee's.

Wilfrid Voynich

Voynich was often suspected of having fabricated the Voynich manuscript himself. As an antique book dealer, he probably had the necessary knowledge and means; and a "lost book" by Roger Bacon would have been worth a fortune. However, the recent discovery of Baresch's letter to Kircher has all but eliminated that possibility.

Jacobus Sinapius

A photostatic reproduction of the first page of the Voynich manuscript, taken by Voynich sometime before 1921, showed some faint writing that had been erased. With the help of chemicals, the text could be read as the name 'Jacobj `a Tepenece': that would be Jakub Horcicky of Tepenec, in Latin Jacobus Sinapius—a specialist in herbal medicine who was the personal doctor of Rudolf II and curator of his botanical gardens. Voynich, and many other people after him, concluded from this "signature" that Jacobus owned the Voynich manuscript before Baresch, and saw in that a confirmation of Raphael's story. Others have suggested that Jacobus himself could be the author.

However, that writing does not match Jacobus's signature, as found in a document recently located by Jan Hurich. So it is still possible that the writing on f1r was added by a later owner or librarian, and is only this person's guess as to the book's author. (In the Jesuit history books that were available to Kircher, Jesuit-educated Jacobus is the only alchemist or doctor from Rudolf's court who deserves a full-page entry, while, for example, Tycho Brahe is barely mentioned.) Moreover, the chemicals applied by Voynich have so degraded the vellum that hardly a trace of the signature can be seen today; thus there is also the suspicion that the signature was fabricated by Voynich in order to strengthen the Roger Bacon theory.

Johannes Marci

Johannes Marci met Kircher when he led a delegation from Charles University to Rome in 1638; and over the next 27 years, the two scholars exchanged many letters on a variety of scientific subjects. Marci's trip was part of a continuing struggle by the secularist side of the University to maintain their independence from the Jesuits, who ran the rival Clementinum college in Prague. In spite of those efforts, the two universities were merged in 1654, under Jesuit control. It has therefore been speculated that political animosity against the Jesuits led Marci to fabricate Baresch's letters, and later the Voynich manuscript, in an attempt to expose and discredit their "star" Kircher.

Marci's personality and knowledge appear to have been adequate for this task; and Kircher, a "Dr. Know-It-All" who is today remembered more by his egregious mistakes than by his genuine accomplishments, was an easy target. Indeed, Baresch's letter bears some resemblance to a hoax that orientalist Andreas Mueller once played on Kircher. Mueller concocted an unintelligible manuscript and sent it to Kircher with a note explaining that it had come from Egypt. He asked Kircher for a translation, and Kircher, reportedly, produced one at once.

It is worth noting that the only proofs of Georg Baresch's existence are three letters sent to Kircher: one by Baresch (1639), and two by Marci (about a year later). It is also curious that the correspondence between Marci and Kircher ends in 1665, precisely with the Voynich manuscript "cover letter". However, Marci's secret grudge against the Jesuits is pure conjecture: a faithful Catholic, he himself had studied to become a Jesuit, and shortly before his death in 1667 he was granted honorary membership in their Order.

Raphael Mnishovsky

Raphael Mnishovsky, the friend of Marci who was the reputed source of Bacon's story, was himself a cryptographer (among many other things), and apparently invented a cipher which he claimed was uncrackable (ca. 1618). This has led to the theory that he produced the Voynich manuscript as a practical demonstration of said cipher—and made poor Baresch his unwitting "guinea pig". After Kircher published his book on Coptic, Raphael (so the theory goes) may have thought that stumping him would be a much better trophy than stumping Baresch, and convinced the alchemist to ask the Jesuit's help. He would have invented the Roger Bacon story to motivate Baresch. Indeed, the disclaimer in the Voynich manuscript cover letter could mean that Marci suspected a lie. However, there is no definite evidence for this theory.

Anthony Ascham

Dr. Leonell Strong, a cancer research scientist and amateur cryptographer, tried to decipher the Voynich manuscript. Strong said that the solution to the Voynich manuscript was a "peculiar double system of arithmetical progressions of a multiple alphabet". Strong claimed that the plaintext revealed the Voynich manuscript to be written by the 16th century English author Anthony Ascham, whose works include A Little Herbal, published in 1550. Although the Voynich manuscript does contain sections resembling an herbal, the main argument against this theory is that it is unknown where the author of A Little Herbal would have obtained such literary and cryptographic knowledge.