In 1639 he issued a
pamphlet at
Cologne to mark the bicentenary of the invention of
printing by
moveable type in Europe, defending the priority of
Gutenberg; it was titled ("Of the rise and progress of the typographic art"), that includes the phrase , "the first infancy of printing". This gave rise to the term
incunabula, which is still used to describe books and broadsheets printed before 1500, the arbitrary cut-off date selected by Mallinckrodt. ==Notes==