Voynich Foldouts: When One Page Was Not Enough

The ordinary codex gives a reader a simple promise.

Turn one leaf.

See one page.

Turn again.

See the next.

The Voynich Manuscript repeatedly breaks that promise.

A sheet opens farther than expected.

Then farther again.

One folio becomes two panels.

Another becomes three.

One exceptional sheet opens vertically and horizontally into a six-panel field.

These are the foldouts.

They are often discussed because they carry some of the manuscript’s most famous diagrams.

The Rosettes.

Large circular cosmological and astronomical designs.

Multi-panel layouts that look spectacular when fully opened.

But the foldout itself is evidence before the diagram is interpreted.

Someone decided that an ordinary page was not enough.

That decision cost more parchment.

It complicated folding.

It complicated binding.

It required a reader to manipulate the physical object in order to see the complete information field.

A foldout is not merely a large page. It is a decision that some relationship must survive beyond the ordinary page boundary.

That is the manuscript-wide job of this article.

Not to decide what the Rosettes mean.

Not to rename every circle.

But to ask what foldout technology tells us about how the Voynich maker organised information.

Quick Read

One-sentence answer: the Voynich Manuscript uses multiple oversized and multiply folded parchment sheets whose panels can function both as separate local pages and as parts of larger continuous diagrams, showing that the physical act of unfolding was part of the manuscript’s information architecture even though the semantic purpose of each foldout remains undeciphered.

Voynich foldouts are wider-than-standard bifolia that create more than the normal four page-surfaces.
Some correspond to three-, four- or five-page widths rather than a standard two-page sheet.
One exceptional bifolium is approximately square when fully opened and has an additional horizontal crease.
Quire 9 is one very wide foldout bifolium comprising folios 67 and 68.
In its present arrangement, folio 67 spans two panels and folio 68 spans three.
Quire 11 contains folio 72, a three-panel foldout paired with a standard folio 71.
Quire 14’s f85/f86 sheet is the only surviving sheet with a horizontal foldout crease in addition to vertical creases.
When fully opened, that sheet forms six panels and carries the large Rosettes composition across one side.
Fold creases sometimes act like page boundaries.
But continuous writing can occasionally cross a fold crease, showing that a crease is not always a semantic boundary.
Some large diagrams continue across several panels and only become intelligible as complete compositions when unfolded.
Folio numbering on foldouts was added with the folio folded in, demonstrating that numbering belongs to a later organisational interaction with the folded object.
Quire 9’s odd crease and quire-number evidence make its binding history unusually important and not fully resolved.
Foldout design does not prove map, cosmology, process diagram or astronomical table.
It does prove that spatial extension beyond the normal page was intentionally available to the maker.

Foldouts therefore add a new dimension to Voynich reading.

Not only:

what is on this page?

But:

what only becomes visible after the reader changes the shape of the book?

A Foldout Is Still a Sheet

The previous article established the bifolium as a production unit.

Foldouts extend the same logic.

A standard bifolium folds once through the centre.

A foldout uses extra width, extra folds or both.

The resulting sheet can create more panels while still belonging to one physical piece of parchment.

This is important because modern digital interfaces often display each panel as a separate image or labelled page.

The viewer can forget that several panels share one uninterrupted sheet.

For large diagrams, that continuity can be the most important relation.

A foldout therefore has at least three identities.

Material identity: one physical sheet.
Panel identity: several fold-defined regions.
Display identity: one larger composition when unfolded.

The manuscript can use all three simultaneously.

Why Make a Foldout at All?

Oversized parchment is not free.

It consumes material.

It complicates preparation.

It creates wear points at creases.

It makes binding more difficult.

Therefore the maker had some reason to accept the inconvenience.

The safest inference is functional but not semantic:

some information relationships required more spatial extent than an ordinary page could provide.

That relationship could be:

large-scale geometry;
multiple circles seen together;
comparison of several panels;
a continuous map-like field;
astronomical or calendrical layout;
process or classification architecture;
something else entirely.

The foldout tells us scale matters.

It does not name the information being scaled.

Quire 9 Is a Foldout Quire Rather Than an Ordinary Stack

Quire 9 is structurally unusual.

It consists of one wide bifolium forming folios 67 and 68, with several panels of text and diagrams.

Folio 67 is two panels wide in the present arrangement.

Folio 68 is three panels wide.

The sheet contains astronomical and cosmological-looking material, much of it circular or radial.

This already tells us the physical format and graphical language belong together.

A large circle with radiating labels benefits from a broader surface.

Several related circular diagrams can be held on one sheet without being forced into independent leaves.

The foldout is therefore not merely extra room for more prose.

Its geometry participates in the information design.

Quire 9 Also Shows That Fold Geometry Can Carry Binding History

Quire 9 is important for another reason.

The quire number appears in an unusual place.

There are crease features that once encouraged the idea that a different fold might have served as a binding fold.

Closer conservator inspection reportedly showed that some apparent sewing preparation marks were small cuts rather than evidence of an actually used previous sewing station.

The history therefore remains more complicated than a simple “bound here first, then rebound there” story.

One plausible possibility is that the large sheet was prepared under one folding expectation and integrated into the codex under another.

Even that remains a reconstruction.

The lesson is stronger than the specific story:

on a foldout, unused creases, numbering and binding positions can preserve competing historical states.

Fold geometry is codicological evidence, not only visual design.

Folio 72 Shows That a Fold Crease Is Not Always a Page Boundary

Folio 72, in Quire 11, is a useful control because it demonstrates that panel boundaries are not absolute textual boundaries.

When fully unfolded, f72 contains several panels.

Some creases separate visually distinct regions.

But continuous writing can cross a fold crease.

This is crucial.

If every crease were treated automatically as a medieval page boundary, that continuous text would be artificially cut.

The fold therefore has two possible roles.

physical hinge;
information boundary.

Sometimes they coincide.

Sometimes they do not.

This is a general warning for digital transcription.

Panel numbering is a modern convenience.

The manuscript’s own text may ignore the panel boundary.

The Rosettes Sheet Is the Extreme Case

Quire 14 contains one non-standard sheet associated with folios 85 and 86.

It is unique among surviving Voynich sheets because it has an additional horizontal foldout crease as well as vertical folds.

Fully opened, the bifolium forms six panels arranged roughly as three above and three below.

One side carries the large composite design usually called the Rosettes page.

The Rosettes article already owns what that diagram may or may not represent.

Here the important fact is format.

The design crosses panel boundaries.

Its major circles and connectors only make full relational sense when the sheet is unfolded.

This means the reader’s physical action is part of access.

The codex contains a temporarily hidden larger field.

That is a different information experience from simply turning to another page.

The Fold Changes What the Reader Can See at One Time

A normal page is visible when the book is open.

A folded panel may be hidden.

Open one flap and a new relation appears.

Open another and the field expands again.

This creates staged visibility.

The manuscript can therefore support at least two reading modes.

Folded mode

Only selected panels are visible within the ordinary codex profile.

Expanded mode

Several panels become one larger spatial system.

We do not know whether the maker exploited this deliberately for progressive explanation.

But the physical capability exists.

A foldout is not static.

It changes state in the reader’s hands.

A Fold Can Hide Adjacency

Two items can be near each other on the fully opened sheet but not simultaneously visible when the sheet is folded.

This complicates modern visual interpretation.

Digital scans often flatten the sheet completely.

That is wonderful for seeing the whole composition.

It can also create an information state the historical reader encountered only after deliberate unfolding.

Conversely, scanning individual panels can fragment a composition the historical reader could see together when fully expanded.

Neither digital view is neutral.

A faithful analysis should preserve:

panel identity;
sheet identity;
folded visibility;
fully opened geometry.

The foldout has more than one legitimate coordinate system.

Foldouts Encourage Circular and Radial Text

Several foldout regions contain circular diagrams, radial text and labels organised around centres rather than along ordinary horizontal prose lines.

This matters because larger surfaces make such geometry easier to construct and read.

It also changes transcription.

A circle has no obvious first word.

A radial line can point inward or outward.

A fold can cut through one graphical region without being its semantic boundary.

Flattening these into ordinary lines imposes modern choices:

where to start;
which direction to read;
which panel owns the text;
whether a crease is a break.

The foldout therefore amplifies the representation problem already identified in the EVA and line-architecture articles.

Geometry is part of the source.

Foldouts Are Evidence for Relational Thinking

The strongest general inference from foldout use is relational.

The maker sometimes wanted several things visible in one larger field.

That is different from simply needing more words.

A long text can continue onto the next page.

A foldout is especially valuable when position relative to other elements matters.

This supports broad function families such as:

map-like relation;
diagrammatic comparison;
astronomical/cosmological organisation;
classification field;
network;
process layout.

Again, those are categories of information architecture.

They are not decoded identities.

The foldout proves spatial relation mattered enough to deserve parchment.

Foldouts Do Not Prove the Manuscript Is a Map Book

Large sheets are common in map-like thinking.

They are also useful for astronomy.

Genealogies.

Tables.

Calendars.

Large diagrams.

Therefore:

oversized surface ≠ map.

Even the Rosettes diagram can be topologically map-like without representing a geographic city or landscape.

Foldout technology tells us how information is arranged.

It does not tell us which external world the arrangement refers to.

Foldouts Do Not Prove a Hidden Sequential Reveal

Because panels open one after another, it is tempting to imagine a deliberate reveal sequence.

First the reader sees Stage 1.

Then unfolds Stage 2.

Then discovers Stage 3.

This could happen in a designed foldout.

It has not been established for Voynich.

A fold may exist simply because the large sheet has to fit inside the binding.

The order of opening may be mechanically convenient rather than semantically encoded.

A sequential-reveal theory therefore needs evidence that information boundaries align with fold states repeatedly.

One dramatic example is not enough.

Fold Creases Can Be Production Evidence

A crease records repeated mechanical history.

It can tell us how the sheet was intended to fit the codex.

Unused creases or unusual cuts can reveal earlier preparation decisions.

Number placement can reveal whether a folio was folded when it was numbered.

Wear patterns can indicate which folds were manipulated repeatedly.

Paint crossing a crease can show that painting treated the sheet as one continuous surface.

Writing crossing a crease can show the same for text.

The fold therefore participates in both content and object history.

It should be recorded as a material feature, not merely the place where a scanner divides images.

Foldouts Make “Page Number” More Complicated

Standard folio notation is already subtle.

A folio has recto and verso.

Foldouts add panel coordinates.

Modern systems use forms such as:

f72r1;
f72r2;
f72r3;
and corresponding verso panels.

These coordinates are essential for scholarly communication.

They are not medieval page labels.

The panel numbers are modern abstractions layered onto a physical fold.

This matters whenever a statistical study treats each panel as an independent page.

The independence may be convenient rather than historical.

The entire foldout remains one production object.

Foldouts Change How We Should Validate Text Statistics

If several panels belong to one foldout, random page-level train/test splitting can leak information.

The panels may share:

hand;
Currier-like regime;
diagram type;
vocabulary;
production session.

A model trained on f72r1 and tested on f72r2 has not necessarily generalised to a truly independent manuscript unit.

Foldout-aware validation should reserve the whole sheet or whole diagram where the research question requires independence.

This is the same principle as bifolium-aware analysis, intensified by non-standard geometry.

Physical design should shape statistical design.

Foldouts Are One Reason the Voynich Manuscript Is Not Just a Text

A purely textual model assumes information can be flattened into a sequence without much loss.

Foldouts resist flattening.

Position matters.

Direction matters.

Distance matters.

Simultaneous visibility may matter.

Fold state may matter.

The manuscript is therefore multimodal at the level of object design, not merely because it contains pictures.

Its physical format can carry relationships.

A transcript that preserves only character order loses some of those relationships automatically.

This is why every serious Voynich representation ultimately has to remain answerable to the physical sheet.

What Survives the Foldout Work

The Voynich Manuscript contains numerous non-standard oversized sheets folded to fit the codex.
Foldouts extend the bifolium principle rather than replacing it.
Some foldout folios contain multiple vertical panels.
Quire 14’s f85/f86 bifolium uniquely includes an additional horizontal fold and six-panel structure.
Large diagrams can extend across several panels as one composition.
Continuous writing can occasionally cross a fold crease.
A crease is therefore a physical boundary that may or may not be a semantic or textual boundary.
Fully opened geometry can reveal relationships hidden in the folded codex state.
Folio numbering on foldouts reflects interaction with the folded object and belongs to a later organisational layer.
Quire 9 preserves unusual folding/binding evidence whose exact history remains unresolved.
Foldouts strongly support the importance of spatial, relational information architecture.
They do not identify the semantics of that architecture.
Foldout sheets should often be treated as whole production units in statistical validation.

What Does Not Survive as Established Knowledge

Every fold crease marks a semantic boundary.
Every foldout was meant to be read in a staged reveal sequence.
Every foldout is a map.
Every large circular diagram is cosmological in the literal sense.
The Rosettes sheet is proven to depict a city, route or landscape.
Panel numbering reproduces medieval page segmentation exactly.
Quire 9’s original folding and binding sequence has been fully reconstructed.
Fully flattened digital images reproduce the historical reading experience without loss.
Each foldout panel is an independent statistical sample.

The oversized spatial field survives.

The decoded function does not.

A Better Foldout Analysis

Record the entire physical sheet before analysing panels.
Map every crease and binding fold.
Distinguish used folds, preparation marks and uncertain creases.
Preserve both folded and fully expanded visibility states.
Mark where writing and drawings cross creases.
Keep panel numbering explicitly modern.
Analyse circular and radial text in its original geometry.
Treat whole foldouts as production units in validation where appropriate.
Separate spatial relation from semantic identity.
Require any staged-reading theory to predict repeated alignment between fold state and information boundaries.

What Would Count as a Real Foldout Breakthrough?

Imagine a complete physical model of every surviving foldout.

For each fold state, researchers record which panels are visible together.

They map text, labels, diagram connectors and crease crossings.

A recurring pattern emerges.

Perhaps one class of fold systematically separates summary from detail.

Or concealed panels consistently contain one textual register.

Or unfolded fields repeatedly connect categories that remain independent when folded.

If the same pattern predicts an unseen foldout, the folding itself becomes part of recovered function.

That would be a true advance.

The breakthrough is not simply seeing more parchment.

It is discovering whether the act of unfolding carries a repeatable information rule.

Primary School: The Hidden Big Picture

Take a long sheet of paper and fold it into three panels.

Draw one picture that crosses all three.

Close the sheet.

Ask the child what can be seen.

Open one flap.

Then all of it.

The child sees how the same object can carry different visible information states without anything being added or removed.

Lower Secondary: Is the Fold a Boundary?

Make two foldouts.

In the first, each panel contains one separate diagram.

In the second, one sentence and one drawing cross the crease.

Ask whether the crease has the same informational role in both.

It does not.

This is the key lesson from f72-like crease crossing.

Upper Secondary: Folded State Versus Expanded State

Give students a six-panel foldout and a map of which panels are visible in each state.

Ask them to distinguish:

physical adjacency;
visible adjacency;
semantic adjacency.

Three different graphs emerge.

This is exactly the kind of reasoning required for complex Voynich foldouts.

JC and Adult Readers: The Foldout as an Interactive State Space

At a higher level, a foldout can be represented as a state machine.

Each state is one configuration of folds.

Transitions are physical unfolding operations.

Each state exposes a subset of the total information field.

The research question becomes:

does content organisation align systematically with the state transitions?

If yes, folding is part of the information system.

If no, folding may be primarily a storage solution for oversized diagrams.

Both are historically meaningful outcomes.

A Parent and Teacher Guide

Model a foldout physically before analysing it digitally.
Separate sheet, panel and display states.
Do not assume every crease is a content boundary.
Keep circular and radial text in its geometry.
Ask what relationships become visible only when expanded.
Do not convert large format automatically into “map”.
Require staged-reading theories to show repeated evidence across foldouts.

The broader lesson is elegant:

sometimes information is not only written on an object; it is organised by what the object can physically do.

Reader Checklist: Before You Interpret a Voynich Foldout

What is the complete physical sheet?
How many folds does it contain?
Which fold is the binding fold?
Which creases are certain and which historically ambiguous?
What panels are visible in the folded state?
What changes when fully opened?
Does writing cross any crease?
Do drawings cross any crease?
Are modern panel numbers being mistaken for medieval page boundaries?
Is the proposed semantic relation visible only after digital flattening?
Does the theory require a particular unfolding order?
Is that order actually evidenced?
Is the whole foldout being treated as one production unit?

Frequently Asked Questions

What is a Voynich foldout?

It is an oversized parchment sheet with additional folds that allows more than the normal number of page-panels to fit inside the bound codex.

How large are the foldouts?

They vary. Some bifolia span roughly three to five ordinary page widths instead of two. The exceptional f85/f86 sheet also includes a horizontal fold and forms six panels.

What is special about Quire 9?

It consists of one very wide foldout bifolium forming folios 67 and 68, with several astronomical and cosmological-looking panels and an unusually complicated folding/binding history.

What is special about folio 72?

It is a multi-panel foldout in Quire 11 and provides a useful example where continuous text can cross a fold crease, proving that a physical fold is not always a textual boundary.

What is special about the Rosettes sheet?

The f85/f86 bifolium has both vertical and horizontal fold creases and opens into six panels. One side carries the large connected Rosettes composition across the expanded field.

Do foldouts prove the Voynich Manuscript contains maps?

No. Oversized relational diagrams are compatible with maps, astronomy, cosmology, classification and many other functions. Format does not identify semantics.

Were foldouts meant to reveal information in stages?

Possibly in some cases, but no manuscript-wide staged-reveal rule has been demonstrated. Folding may simply have allowed oversized diagrams to fit inside the codex.

Why are foldouts important for transcription?

Because circular, radial and crease-crossing writing cannot always be represented faithfully as ordinary linear page text. Modern panel numbering and linearisation introduce choices.

What is the strongest current conclusion?

The Voynich maker deliberately used oversized, transformable parchment surfaces for some of the manuscript’s most relational material. The folds are part of the physical information architecture even though their exact semantic role remains unknown.

Research and Further Reading

The Final Idea

The Voynich foldouts are the places where the codex admits that the ordinary page is sometimes too small an idea.

A page ends.

The relationship does not.

So the parchment keeps going.

It folds back on itself to survive inside the book.

Then the reader opens it and restores the larger field.

That gesture is simple.

Its implication is not.

The manuscript contains information designed at more than one physical scale.

Some relationships live inside a word.

Some inside a line.

Some across a page.

And some require the book itself to change shape.

To understand the foldouts, we should not only ask what the expanded picture depicts. We should ask why the relationship needed to be physically unfoldable in the first place.

Voynich | Everything eduKate Knows and Tested | The Foldouts: When One Page Was Not Enough