The late Professor J. Henry Middleton referred to this matter of cost in his valuable work on “Illuminated Manuscripts” (1892). After quoting from Aulus Gellius, he wrote—
“But ordinary copies of newly-published works, even by popular authors, appear to have been but little more expensive than books of this class are at the present day. The publisher and bookseller Tryphon could sell Martial’s first book of Epigrams at a profit for two denarii—barely two shillings in modern value (see Mart. xiii. 3). It may seem strange that written manuscripts should not have been much more costly than printed books, but when one considers how they were produced, the reason is evident. Atticus, the Sosii, and other chief publishers of Rome, owned a large number of slaves, who were trained to be neat and rapid scribes. Fifty or a hundred of these slaves could write from the dictation of one reader, and thus a small edition of a new volume of Horace’s Odes or Martial’s Epigrams could be produced with great rapidity, and at very small cost” (p. 19).
In the fifteenth century, even, illustrated Books of Hours were produced in France, Flanders, and Holland at a cheap rate. Mr. Middleton wrote—
“Education had gradually been extended among various classes of laymen, and by the middle of the fifteenth century it appears to have been usual not only for all men above the rank of artizans to be able to read, but even women of the wealthy bourgeois class could make use of prayer-books. Hence arose a great demand for pictured Books of Hours, which appear to have been produced in enormous quantities by the trade scribes of towns, such as Bruges, Paris, and many others. These common manuscript Hours are monotonous in form and detail; they nearly always have the same set of miniatures, which are coarse in detail and harsh in colour” (p. 141).
Mr. Middleton gives some further information respecting the cost of production of certain service-books taken from some church records in