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".
In 1639 he published a pamphlet at Cologne to commemorate the bicentenary of the invention of printing by movable type in Europe, defending Gutenberg's priority; it was titled  ("On the development and advancement of typography"), that includes the phrase , "the initial stage of printing".