Experts have discovered twisted lines in some of the old prints; a line in a woodcut may easily be broken but it can hardly be bent, and it is now asserted that many of the woodcuts, including the beautiful initial letters in Fust and Schoeffer's 'Psalter,' were really engraved on metal. The view of London at the head of the first page of the _Illustrated London News_ is, we are told, cut in brass; Mulready's well-known envelope, engraved on brass by the celebrated wood-engraver, John Thompson, may be seen in the South Kensington Museum; and scores of other examples of metalwork of this kind might be cited. {52} [Illustration: ORNAMENTS FROM 'HEURES A L'USAIGE DE CHARTRE' (_Published by Vostre_)] And there is no doubt that the famous illustrations of the Missal, or 'Book of Hours,' issued in Paris between 1490 and 1520, were engraved on metal of some kind, perhaps on copper or some amalgam of tin and copper. There was a metal known as 'latten' in those days, and probably the engraving was done on some material of this kind, not too hard to cut, not too soft to wear away. It will be noticed that the groundwork of many borders in the French books is filled with little white dots, _criblé_ it was called; these dots are, in the first place, to imitate similar work in the gold grounds of the borders of illustrated missals, and, in the second place, to save the labour of cutting away so much of the metal as would be required for a white ground. These dots were evidently {53} made by means of a sharp and finely-pointed tool driven by a blow into the metal. (See page 59.) France was not early in the field with illustrated books, but she quickly made up for the delay by the excellence of her work, more especially in ornament. In 1488, Pierre Le Rouge, a printer and publisher, sent forth a book, 'LA MER DES HISTOIRES,' which contains many charming designs, from which beautiful wall-papers we know of have been borrowed; they are as well engraved as similar work at the present day, and only needed better 'over-laying' by the pressman, an art but little practised at that time. This book contains the first decorative work by wood-engraving we have met with, and shows the great excellence of art in France at this period. There is a good example, though much reduced in size, among the illustrations of Mr. William Morris's paper 'On the Woodcuts of Gothic Books,' that he read before a meeting of the Society of Arts in January 1892: it is printed in the Journal of the Society for February 12th.