|This horn book includes |
via the fontfeed
“Long before the invention of printing, hand painted letter boards were widespread as teaching material in schools. ABC tablets made of wood were already mentioned in an English manuscript as early as the 14th century. Later a thin, transparent horn plate was used to protect the paper glued on the board against wear and dirt. This is why up to this day letter boards are still called horn books in English-speaking regions, even though they are not books in the conventional sense of the word…”
Read the rest here, and learn a bit more about horn books here and here.