The natural method of illustrating a book printed with type is by means of designs cut in relief, which can be locked up in the forme with the type, so that text and illustrations are printed together by a single impression[29] without any special preparation of the paper. So long as the design to be printed stands out clearly on the block it matters nothing whether it be cut on wood or on soft metal. Even as between the design cut by hand and the process line-block which has as its basis a photograph taken direct from a pen drawing, the difference can hardly be said to be one of better and worse. We lose the individuality of the wood-cutter or wood-engraver, but we are brought into closer touch with the individuality of the artist, and whether we gain or lose depends on the ability of the artist to dispense with a skilled interpreter. The one requisite for success is that either the artist, or an interpreter for him, should recognize the limits within which his work can be effective. The reproductions of the artist's designs will be looked at, not in isolation, but as part of an _ensemble_ made up of two pages printed in a type which, perhaps with a little trouble, can be ascertained beforehand, and they will be printed not as proofs on a special press by a special workman on paper chosen solely to suit them, but with average skill and care in an ordinary press and on paper the choice of which will be dictated by several considerations. Whenever relief blocks have been used for any length of time as a method of book-illustration the rivalry of artists has tended to cause these restrictions to be forgotten. In our own day line-blocks have been almost driven out of the field by "half-tones," which cannot be printed without the aid of paper specially coated, or at least rolled or "calendared." Shortly before the process line-block was perfected the extreme fineness of the American school of wood-engraving had induced a nearly similar result. The successors of Bewick worked with equal disregard of the need for clearly defined lines, and when we travel back to the first half of the sixteenth century we find the Holbeins, Burgkmair, Weiditz, and other artists producing designs far too delicate for the conditions under which they were to be reproduced. Thus the charm of the woodcuts in books of the fifteenth century is by no means confined to that "quaintness" which is usually the first thing on which the casual observer comments. The "quaintness" is usually there, but along with it is a harmony between print, paper, and woodcut which has very rarely since been attained.