If there were no medieval monks and copyists, many important ancient works would not have survived to our times. Copyist’s work efficiency was 3-6 cards in quarto per day – in Quarto in letterpress it is a double-folded sheet of paper that consists of four cards and eight pages. It took a year to rewrite, for example, the “Bible”. A copyist could rewrite 40 works in his lifetime.
It is noteworthy, however, that copyists rewritten works which they believed deserved it and were the most useful works of classical literature.