We shall therefore consider ourselves entitled to abandon all speculations on the first cause of this discovery in favour of an exclusive attention to such facts as mark an advance from the dim foreshadowing of its future capabilities to the intelligent and persevering practice of the perfected processes of the art. We shall be content to inquire towards what epoch this new method, the heir of popular favour, supplemented the old resources of the graphic arts by the multiplication of engravings in the printing press. And we may therefore spare ourselves the trouble of going back to doubtful or remote information, to archæological speculations, more or less excused by certain passages in Cicero, Quintilian, and Petronius, or by a frequently quoted phrase of Pliny on the books, ornamented with figures, that belonged to Marcus Varro.[3] Moreover in examining the historical question from a comparatively modern epoch only, we are not certain to find for ourselves, still less to provide for others, perfectly satisfactory answers. Reduced even to these terms, such a question is complicated enough to excuse controversy, and vast enough to make room for a legendary as well as a critical view of the case. Xylography, or block printing, which may be called the art of stamping on paper designs and immovable letters cut out on wood, preceded without doubt the invention of printing in movable metal characters. Some specimens authentically dated, such as the "St. Christopher" of 1423, and certain prints published in the course of the following years, prove with undeniable authority the priority of block printing. It remains to be seen if these specimens are absolutely the first engraved in Europe; whether they illustrate the beginning of the art, or only a step in its progress; whether, in one word, they are types without precedent, or only chance survivals of other and more ancient styles of wood engraving.