Both medieval manuscripts and their modern counterparts are designed to accommodate human readers. Our two hands can keep an open book under control with ease by applying gentle pressure on the outer margins of the pages. Release the pressure with your right hand and a page lifts up in the air, just enough to conveniently flip it. With a rustling sound it travels from right to left, moved along by an impatient reader that is left in suspense for a second or two. The proportions of the page, too, are designed to accommodate consumption by human beings. Our eyes can handle only a small number of consecutively placed words, no more than eight or so, depending on the size of the letter. As a consequence, medieval page design shifted to presenting a text in two columns rather than one, a transition that occurred over the course of the twelfth century.

This relationship between book design and human anatomy is seen most vividly in a particularly peculiar bookish object that thrived in the sixteenth, seventeenth and eighteenth centuries: the hornbook (Fig. 1).

This charming device is a primer: a text used by children as they were learning to read. It contains the alphabet (naturally), but also a small collection of short texts, such as the Lord’s Prayer and Hail Mary (more here and here). Its design reflects perfectly how the material format of books was customised for use by human beings: its user could easily grab a hornbook with one hand and hold it up at eye height. With his other hand the user could then duplicate the letters before his eyes. Two important things stand out when one observes the tradition: the variety of materials used to produce hornbooks – which were made of such materials as wood, lead and gingerbread – and its time of invention, which predate the proposed origins in current scholarly literature.

Materials
The heart of the hornbook is text, albeit a very small amount of it. In fact, it may well be the shortest read to survive from the early-modern period. Most hornbooks from that time are made out of wood. The pupil’s “required readings” were printed on a sheet of paper that was subsequently covered by a thin piece of horn for protection – hence the object’s name. The result is a remarkably sturdy object, which you can drop without damaging it, a minimum requirement for something used by young kids.

Several surviving hornbooks show that the device was also used to teach kids to add and subtract. The one seen in Fig. 2, which dates from the eighteenth century, has a nifty add-on: an abacus. This particular specimen shows the end of the hornbook’s development, which appears to have become more sophisticated over time. The one in Fig. 2 contains another novel feature: the sheet of paper can be removed from behind the horn and replaced by another text, which may perhaps even be found on the reverse (here is another example). This late model is rather like an iPad with several apps loaded, one of which can even be updated when needed!

Other hornbooks were made out of even sturdier materials, such as ivory and lead (Fig. 3). The last one must have been particularly cheap and easy to produce, probably with the help of a mould. This specimen shows that the hornbook was subject to mass production, like its cousin, the printed book.

Quite different is the hornbook seen in Fig. 4. This wooden slab could be used to produce a gingerbread hornbook, handle and all. The tradition of this particularly tasty type of hornbook goes back to the seventeenth century. The English poet Matthew Prior (d. 1721) mentions it in one of his poems: “To Master John the English maid / A horn book gives of ginger-bread / And that the Child may learn the better / As he can name, he eats the letter / Proceeding thus with vast delight / He spells, and gnaws from left to right” (source). Although a peculiar book, the gingerbread version of the hornbook probably wins the prize for best didactical tool: what better reward than to eat the letter you were just able to read out loud?

Medieval origins
While the heyday of the hornbook was no doubt the early-modern period, the scholarly literature will also tell you that this bookish device was in used in the fifteenth century, during the late medieval period. In fact, publications on the topic stress that there are also handwritten – medieval – versions of the device. Peculiarly, I wasn’t able to find one, except for this early-sixteenth-century specimen. Even illustrations showing hornbooks “in the wild” date from the seventeenth century at best, such as the pair hanging from the chapman’s basket in an engraving from 1646 (Fig. 5).

So is the hornbook a post-medieval invention? I was about to draw this conclusion, given the lack of evidence predating the early-modern period, when I coincidentally encountered the following illustration in a 14th-century Italian manuscript with an unidentified devotional text about Mary, the mother of Christ (Fig. 6-7).

The image shows Christ being brought to school by his mother. He is bringing his “textbook” to class: a hornbook, which dangles from his wrist by a string, just like many of the later specimens did (see the hole in the handle in Fig. 1). Quite intriguingly, we are shown a real medieval snapshot of how children carried their hornbook to and at school. More importantly, it shows that the hornbook was indeed a medieval invention. Some further digging revealed additional visual evidence of hornbooks being used in before the age of print (Fig. 8).

The manuscript, which was produced in Germany in 1440-1460, shows a teacher holding up a hornbook, using it to show Arabic numerals to a pupil in front of him. The German text bubble next to the scene is very positive about this teaching moment: “With calculus and numbers, I can be a star in arithmetic!” While it was produced somewhat later than the Italian example in Fig. 6, the setting in which the hornbook was used is the same: a context where basic information about letters and digits is conveyed to young pupils. While no actual hornbooks appear to survive from the medieval period, these visual representations show that educating young children was also the driving force behind the production of hornbooks in the age before print.