Voynich Comparator | Kitab al-Diryaq, BnF Arabe 2964: When Snakes, Plants and Compound Antidote Became One Pharmacological Image System

A medical manuscript does not have to begin with the plant.

It can begin with the danger.

A bite.

A venom.

A body at risk.

Then the substances matter because they answer the danger.

BnF Arabe 2964—the celebrated Kitāb al-Diryāq, or Book of Theriac—gives the Voynich Comparator programme a radically important control.

The Bibliothèque nationale de France dates the illuminated manuscript to about 1198–1199 and identifies it as an Arabic pharmacological work associated with Pseudo-Galen. Its subject is theriac: compound antidotal medicine, especially in relation to poisonous snakebite. The manuscript is decorated with six narrative miniatures and plates of medicinal plants, together with highly accomplished ornamental writing.

This is not a Latin herbal.

It is not Paduan.

It is not fifteenth century.

That distance is exactly why it matters.

Kitab al-Diryaq proves that illustrated pharmacology could organise animal danger, medicinal plants, compound antidotes, learned authority and narrative imagery into one coherent book centuries before the Voynich parchment was made.

Quick Read

BnF Arabe 2964 is the Kitāb al-Diryāq, the Book of Theriac.
BnF records date the manuscript to about 1198–1199.
The work is a pharmacological treatise associated with Pseudo-Galen.
The surviving manuscript is written on paper.
Its place of production is often associated cautiously with the Jazira or a related Islamic manuscript environment; the BnF presents that localisation with uncertainty.
The book concerns theriac and antidotes against poisonous bites.
It contains six narrative miniatures.
It also contains plates of medicinal plants.
The manuscript therefore integrates narrative, dangerous animals, pharmacological substances and plant imagery.
Its existence demonstrates that several Voynich-relevant medical functions are not uniquely Latin, Italian or fifteenth-century.

Comparator Firewall

Arabic pharmacology + medicinal plants + animal imagery does not imply Arabic Voynichese. This manuscript is a cross-cultural control for medical information architecture, not a language or provenance proposal.

The Medical Story Begins With Poison

A herbal begins naturally with substances.

An antidote book can begin with the problem substances must solve.

Snakebite creates a chain:

dangerous animal → venom/exposure → bodily risk → antidotal substance → compound preparation → survival

This is a different information architecture from “plant name → plant description.”

That matters for the Voynich.

If the manuscript contains a pharmacological system, plants might not be the top-level subject.

They might be resources inside a larger problem–response architecture.

The Snake Is Not Decoration

BnF’s presentation of the manuscript highlights images of healing snakes and explains the book’s connection to antidotal pharmacology.

The animal is part of the causal model.

It identifies the hazard against which the medicinal system is organised.

This gives us a useful control for animal imagery in medical manuscripts.

An animal can represent:

a source of medicine;
a source of poison;
a disease vector;
a test of antidotal power;
a narrative actor;
a symbolic carrier;
or more than one role at once.

Therefore an animal in a Voynich comparator should never be assigned meaning merely by species resemblance.

Its relation to the rest of the page matters more.

The Plant Plates Are Pharmacological, Not Merely Botanical

The manuscript includes medicinal-plant plates.

This is important because the same visual object—a plant—can perform very different intellectual jobs in different books.

A plant image may support:

identification;
materia medica;
ingredient selection;
substitution;
memory;
teaching;
or prestige display.

In the Kitab al-Diryaq, the plant belongs to an antidotal pharmacological system.

That means a visually similar plant in another manuscript does not automatically have the same textual or medical role.

Compound Medicine Changes the Unit of Meaning

Theriac is not one simple medicinal plant.

It belongs to the world of compound medicines.

Once medicine becomes compound, the information problem changes.

The practitioner needs to know not only what substances are, but how they combine.

Sequence matters.

Preparation matters.

Compatibility matters.

The finished medicine becomes a transformation of its ingredients.

This is directly relevant to the Voynich pharmaceutical pages.

If roots, leaves and vessel-like forms belong to a compound-medicine system, the relationship between them should encode operations rather than simply inventory.

Narrative Miniatures Can Carry Scientific History

The manuscript contains six narrative miniatures.

This matters because technical books do not need to choose between “scientific diagram” and “story picture.”

Historical or legendary narratives can explain the origin, authority or use of a medicine.

The narrative layer can legitimise the technical layer.

This gives us another control against over-classifying Voynich images.

A strange human scene inside a technical manuscript may be:

instruction;
history;
authority narrative;
memory cue;
allegory;
or practical depiction.

The surrounding text relationship has to decide.

Ornamental Script Is Still Script

The BnF emphasises the manuscript’s remarkable decorative writing, including ornamental Kufic forms.

This is useful for the Voynich script problem because visual strangeness can arise from stylisation as well as from unknown language or cipher.

But the comparison must be handled carefully.

Voynich script does not become Arabic because another medical manuscript uses unusual Arabic calligraphy.

The transferable lesson is more abstract:

letterform appearance, script system and underlying language are three separable layers.

A visually exotic script may still encode ordinary readable language for its intended community.

This Is a Deep Cross-Cultural Control for the Latin Medical Stack

Our current Comparator library includes Antidotarium Nicolai, Pseudo-Mesue, Serapion, Circa instans and several Latin medical compendia.

The Kitab al-Diryaq prevents that library from becoming unconsciously Latin-centred.

Medieval pharmacology was a network across Greek, Syriac, Arabic, Latin and vernacular traditions.

Ideas, substances and textual authorities crossed linguistic boundaries.

Therefore a Voynich medical hypothesis should be tested against multiple manuscript cultures, not only northern Italian herbals.

The Date Removes Several False Clues

Arabe 2964 is roughly two centuries older than the Voynich parchment.

That chronological distance is useful because it tells us which behaviours are not special to 1400–1450.

illustrated pharmacology is older;
compound antidotal medicine is older;
medical plant plates are older;
animal–medicine causal imagery is older;
cross-cultural pharmacological transmission is older.

Any Voynich hypothesis that treats these as novel fifteenth-century innovations is therefore miscalibrated.

The Geographic Control Is Equally Important

The Padua hypothesis gains interest from the dense medical and pharmacological environment of northern Italy.

But Arabe 2964 reminds us that sophisticated illustrated pharmacology was not invented there.

To localise Voynich to Padua, we need specifically Paduan evidence.

“There were medicinal plants and compound remedies” is not enough.

Those belong to a much larger medical world.

What Kitab al-Diryaq Can Legitimately Teach Voynich Research

Illustrated pharmacology is not uniquely Latin or Italian.
Animal danger, medicinal plants and compound treatment can form one coherent medical system.
Plant images can serve antidotal pharmacology rather than standalone botany.
Technical manuscripts can combine narrative and didactic imagery.
Compound medicine requires relational information about transformation, not merely ingredient lists.
Ornamental script appearance should not be confused with language identity.
Medical knowledge can cross languages and cultures while changing representation.
Several Voynich-relevant medical behaviours predate the Voynich parchment by centuries.

What It Does Not Prove

that Voynichese is Arabic;
that the Voynich derives from Kitab al-Diryaq;
that Voynich plants are antidote ingredients;
that its animal-like forms refer to venom;
that its vessels contain theriac;
that an Islamic manuscript origin explains the Voynich script;
that cross-cultural transmission removes the need for specific evidence.

The eduKate Antidote-System Test

Build a comparator corpus of illustrated antidote and poison manuscripts across Arabic and Latin traditions.
Encode hazard, animal, plant, compound, preparation and treatment relations separately.
Measure which page types carry identification versus procedure.
Track how theriac traditions change under translation.
Compare plant-image ancestry independently from recipe ancestry.
Test whether Voynich pharmaceutical pages contain stable ingredient–vessel relationships.
Test whether any animal imagery participates in repeated causal structures.
Reject antidotal interpretations that depend only on visual resemblance to snakes, jars or roots.
Keep language, image ancestry, pharmacological function and provenance as separate claims.

Student Lens: Start With the Problem, Not the Ingredient

Primary: compare a book organised by plants with one organised by emergencies such as burns, bites and cuts.

Lower Secondary: map danger → cause → treatment as a chain.

Upper Secondary: distinguish an ingredient inventory from a compound-medicine process.

JC and adult readers: model pharmacological manuscripts as causal networks linking hazards, substances, transformations and outcomes.

Research Sources

The Final Idea

The Kitab al-Diryaq widens the room.

Once it enters the comparator field, the medieval medical image world is no longer merely a corridor of European herbals.

It becomes a network of hazards, substances, animals, plants, antidotes, translation traditions and different visual languages.

The Voynich becomes easier to study when the comparator library is large enough that “medieval medicine” no longer means “the few Latin herbals that happen to look most like Voynich.”