Note 342 — Chapter VI · THIRD PERIOD OF HUMANISM

From a memorial presented by these printers to Sixtus IV. in 1472 we ascertain some facts about their industry. They had at that date printed in all 12,495 volumes. It was their custom to issue 265 copies each edition; the double of that number for Virgil, Cicero's separate works, and theological books in request. Cantù, Lett. It. p. 112. See Cantù, p. 110, for details of the earliest Latin books.