RAT FILE 0004 · UNEXPLAINED
Beinecke MS 408, the Voynich manuscript, is a Central European codex from the late 1400s or the 1500s. Yale says the script is unidentified, the author unknown, and that cryptographic attempts have not read it — if it is even encoded. The original is locked down. Scans are public. Roger Bacon is a rumor the library itself calls speculation.
THE RAT WILL NOT: No claim that it is a hoax, no claim that it is a real language, no Bacon authorship.
Yale's Beinecke page states the date, the unidentified script, the unknown author, and that crypto attempts have failed to decipher the text if it is encoded.
Written in an unidentified script by an unknown author, the manuscript and its meaning have been debated since its appearance on the rare book market in 1912.
Beinecke Library · Library page · retrieved 2026-10-04
The library says scientific testing suggests material consistency with fifteenth-century manuscripts, and describes six illustrated sections: plants, astronomy, baths, cosmology, pharmacy, and a recipe-like text.
scientific testing suggests material consistency with manuscripts produced in the fifteenth century.
Beinecke Library · Library page · retrieved 2026-10-04
That Roger Bacon wrote it. The Beinecke page says Rudolf II believed this and that the association is pure speculation. The rat does not adopt it.
The association with Roger Bacon is pure speculation.
Beinecke Library · Library page · retrieved 2026-10-04
Public access to the physical book is restricted. The library says high-resolution images of the entire manuscript are available in its digital library, with zoom and download.
High-resolution images of the entire manuscript are available for research in our digital library.
Beinecke Library · Library page · retrieved 2026-10-04
Any specific decipherment theory posted after the library's own description. The rat did not pick a winner. Yale says it does not evaluate individual theories.
Beinecke Library is unable to respond to individual theories about the manuscript due to the volume of proposals received.
Beinecke Library · Gap · retrieved 2026-10-04
This is the deep hole. Six hundred ducats of confidence, zero agreed reading. The rat's job is to point at the scans and refuse fan fiction. If a theory cannot show the page, it is not evidence.