Page:De Vinne, Invention of Printing (1876).djvu/405

Rh blocks; in the two buttons, which Dr. Van der Linde says are improperly translated by him as two screws, he finds a screw chase that held the four pages together. This conjecture is in every way improbable. All the processes of block-printing should have been as well known at that time in Strasburg as they were in Venice, Augsburg and Nuremberg. Something more novel than this form of printing would have been required to secure the coöperation of shrewd men like Riffe and Heilmann. The enthusiasm of Dritzehen, and he eagerness of all parties to learn the new art, and to have a share in its profits, cannot be satisfactorily explained by the conjecture that this art was simple block-printing.