This latter was, doubtless, cousin to him who deliberately cut down all his books close to the text, because he had been several times annoyed by readers who made marginal notes. The indignities, too, suffered by some books in their lettering! Fancy an early black-letter fifteenth-century quarto on Knighthood, labelled "Tracts"; or a translation of Virgil, "Sermons"! The "Histories of Troy," printed by Caxton, still exists with "Eracles" on the back, as its title, because that name occurs several times in the early chapters, and the binder was too proud to seek advice. The words "Miscellaneous," or "Old Pieces," were sometimes used when binders were at a loss for lettering, and many other instances might be mentioned. The rapid spread of printing throughout Europe in the latter part of the fifteenth century caused a great fall in the value of plain un-illuminated MSS., and the immediate consequence of this was the destruction of numerous volumes written upon parchment, which were used by the binders to strengthen the backs of their newly-printed rivals. These slips of vellum or parchment are quite common in old books. Sometimes whole sheets are used as fly-leaves, and often reveal the existence of most valuable works, unknown before--proving, at the same time, the small value formerly attached to them. Many a bibliographer, while examining old books, has to his great puzzlement come across short slips of parchment, nearly always from some old manuscript, sticking out like "guards" from the midst of the leaves. These suggest, at first, imperfections or damage done to the volume; but if examined closely it will be found that they are always in the middle of a paper section, and the real reason of their existence is just the same as when two leaves of parchment occur here and there in a paper volume, viz.: strength--strength to resist the lug which the strong thread makes against the middle of each section. These slips represent old books destroyed, and like the slips already noticed, should always be carefully examined.