So to the public were presented the works laboriously composed by Gutenberg, Schoeffer, and Fust, somewhat after the manner of manuscripts, which they pretended to imitate, with their solid wooden boards covered with pig or calfskin. At the four corners, copper nails, with large heads, prevented rubbing against the shelves of the bookcase, for at that time books were ranged on their sides, and not as they are to-day. We must return to the bibliomaniac of the "Ship of Fools" to get an idea of these depositories; before him may be seen ranged on a desk large folios, with nails on their sides, in the shelves, so defying the dust, in place of being placed upright on their edges, which rendered them liable to spots and stains. (See fig. 23.) Unhappily the wooden sides had in themselves a germ of destruction, the worm, capable first of reducing the sides to powder and then ravaging the body of the work, the ligatures and cords. Certain preparations destroy the insect, but the precaution often has no effect, and it is thus that the disappearance of volumes formerly so abundant, but almost impossible to find now, may be explained. [Illustration: Fig. 105.--Bookbinder's shop in the sixteenth century. Engraving by Jost Amman.] From the beginning the operations of the binder were what they still are, except for improvements. They consist in the collation of the sheets of a book, folding them, beating them to bring them together and give them cohesion, and sewing them, first together, then on the cords or strings, which form the five or six bands seen on the backs. Primitively these cords were united to the wooden boards, and over both was placed a resistant skin, on which from relief or metal engravings were struck the most pleasing decorative subjects. Pigskin, white and fine, lent itself, especially among the Germans, to these fine editions; and although they were issued in great number, the wooden boards have not permitted them all to exist in our time. The most ancient that we are able to cite are German works of the time of Louis XI.; they are very strong and coarse. The cords in them form an enormous and massive projection. The inside of the board was often without lining of paper or stuff. In the case of fine editions a sombre velvet was sometimes used, such as Verard used to bind the books of the father of Francis I., as we have before said.