During the whole of the 12th and 13th centuries the pen played a more distinguished part than the brush in the art of illumination; since, not only was the former almost exclusively employed in outlining both foliage and figures, but the use of the latter was generally limited to filling up, and heightening with timid shadowing, the various parts defined by the former, and which were altogether dependent upon it for expression. In fact, it appears as if the principal patterns in 13th century illumination had been designed by stained-glass painters, the black outlines being equivalent in artistic result to the lead lines which, in the best specimens of grisaille and mosaic windows, keep the forms and colours distinct and perfect. This firm dark outlining was retained in England later than in France, and was combined in the former country with a more solid and somewhat less gay tone of colour than ever prevailed in the latter. So late as the 15th century, this correspondence between stained glass work and illumination still obtained; thus, as Mr. Scharf remarks, in a note to his interesting paper on the King's College, Cambridge, windows, in the Transactions of the Archæological Institute for 1855, "The forty windows of the monastery of Horschau contained a series of subjects minutely corresponding to those of the Biblia Pauperum," &c. The initial letters which in Romanesque illumination had expanded into very large proportions as a general rule,[64] diminished; but, in compensation, effloresced, as it were, into floreated terminations, which were at last not only carried down the side of the page, but even made to extend right across both the top and bottom of it. During the reigns of the three first Edwards in England, the tail, as it might be called, of the initial letter, running down the side of the page, gradually widened, until at length it grew into a band of ornament, occasionally panelled, and with small subjects introduced into the panels. In such cases, the initial letter occupying the angle formed by the side and top ornaments of the page, became subsidiary to the bracket-shaped bordering, which, in earlier examples, had been decidedly subsidiary to the initial letter. As no one can doubt that the 14th century was the period during which illumination attained its highest perfection, not only in point of artistic spirit in design, but in the dexterous processes of execution as well, it has been considered that it might prove useful to the English student to supply him or her with as large a proportion as possible of illustration of that which we may really regard in matter of illuminating as our national style. Thus our plates in this manual, Nos. 7, 8, and 9, have been taken from a Latin Bible (B. M. Reg. 1, D. 1), exquisitely written on Uterine vellum, about the commencement of the 14th century, by an English scribe, whose autograph at the end of the holy text declares that "Wills. devoniensis scripsit istum librum."