The great improvement which came in book-illustration and the making of prints we owe to Albrecht Dürer, who not only was the first to discover the capacities of wood-engraving as a mode of artistic expression, but who saw immediately that it could not equal the rival art of copperplate-engraving in that delicacy of line and depth of tone on which the metal-engraving depends for its excellence, but appreciating the limitations, Dürer prescribed the materials and processes of wood-engraving. {160} [Illustration: PAGE OF "BOOK OF HOURS" MADE FOR SIMON DE COLLINES (TORY)] {161} He increased the size of the cuts, gave breadth and boldness to the lines and obtained new and pleasing effects from strong contrasts of black and white. As Woodberry in his "History of Wood-Engraving" (Harper's, New York, 1883) says: "He thus showed the true method of wood-engraving; but the art owes to him much more than this: he brought to the practice of it the hand and brain of a great master, lifted it, a mechanic's trade, into the service of high imagination and vigorous interest and placed it among the fine arts--a deed of far more importance than any improvements in processes or methods." In so doing, may we add that he only accomplished what so many of his contemporaries did in other arts. The goldsmiths became sculptors and painters, the decorators became true artists and the scholars learned from their classical books to execute what they had studied in the ancients. It would be hard to say enough of Dürer's wood-engravings. His prints must be allowed to talk for themselves. Unfortunately, owing to limit of space, we are only able to give one of them, but that will furnish an excellent example of the marvellous qualities Dürer succeeded in expressing, in what might have seemed before this time a hopelessly coarse medium. The first of the four famous series of designs by which his skill in wood-engraving is first shown was published in 1498, but it was probably finished before that time. It consisted of fifteen large woodcuts in illustration of the Apocalypse of St. John, to which a vignette of wonderful nobility and simplicity was prefixed. Other men did wonderful work in this new medium, after Dürer had shown them the way, though none of them surpassed or perhaps even equalled their master. Portions of the triumphal procession of Maximilian by Hans Burgkmaier show that his disciples were thoroughly capable of following in his footsteps. Such men as Hans Schaeuffelin and Hans Springinklee, as well as Hans Baldung, far surpassed most of their successors in the artistic quality of their wood-engraving. Lucas van Leyden and the Cranachs show how artists took to {162} this new mode of expression, and a series of men working in this century prove the wonderful power of the time to stimulate men's genius.