The inherent conditions of book decoration point to the line drawn by hand, and reproduced, either by wood-engraving or by direct facsimile process, as its proper method. Indeed, the ideal of paginal beauty would be reached by leaving both the text and the illustrative design to hand, if not to one hand. This, however, is out of the question; the cost alone is prohibitive. The point for the book-decorator to consider is, what sort of line will range best with the type. In the case of the second division of our classification, which, in default of a better name, may be called "record work," it is impossible to apply to the line the amount of abstraction and selection which would be necessary in pure design. To do so, for instance, in the case of an architectural illustration, would destroy the "vraisemblance" which is of the essence of such a drawing. Even in this case, however, the line ought to be very carefully considered. It is important to recollect that the type establishes a sort of scale of its own, and, taking ordinary lettering, this would exclude very minute work where the lines are close together and there is much cross-hatching; and also simple outline work such as Retsch used to labour at, for the latter errs on the side of tenuity and meagreness as much as process-reproduction of brush-work sins in the opposite extreme. The line used in architectural illustration should be free, accurate, and unfaltering, drawn with sufficient technical knowledge of architecture to enable the draughtsman to know where he can stop without injury to his subject. The line should not be obstinate, but so light and subtle as to reflect without effort each thought that flits across the artist's mind. Vierge has shown how much can be done in this way. With a few free lines and the contrast of some dark piece of shading in exactly the right place, he will often tell you more of a subject than will the most elaborately finished picture. This is the method to aim at in architectural illustration. The poetry of architecture and its highest qualities of dignity of mass and outline are smothered by that laborious accuracy which covers every part of the drawing with a vain repetition of unfeeling lines.