Damp, water or some other liquid has come into contact with the text or binding and has left a stain. Where this has left little visible damage, the dampstain may be “pale” or “light”.
The rough uncut edge of a sheet of paper, named after the deckle, the frame used in a paper-making machine to confine the pulp within the desired limits. Books which are uncut retain their deckle edges.
An ornamental lining, of leather or watered silk, on the inside front cover (in place of the pastedown), usually entirely surrounded by leather turn-ins. Attributed to the French binder Badier in 1703 and a regular feature of French binding ever since, the doublure became popular among English and American deluxe binders in the later nineteenth century.
The size of a book, or of the page of a book, in which each leaf is one-twelfth of a whole sheet: widely abbreviated 12mo. Hence also a book or volume of this size. A duodecimo can therefore be said to be gathered in twelves, and each gathering or quire has 24 pages.
A detachable paper cover issued with a case-bound book, with flaps folding around the fore edges of the cover. Dust jackets with flaps were in common use by the 1860s but surviving examples before the 1890s are extremely scarce, as dust jackets were then regarded as dispensable and were usually removed at the point of sale. Paper jackets of the earliest date were usually printed in only one colour, a drab protective casing for the more elaborate and colourful cloth beneath. They were sometimes of glassine (glossy transparent paper) with perhaps only the price printed on them. With the decline of triple-deckers in the 1890s and the growth of new graphic design schools, the decorative effort in book design shifted from the cloth case outwards to the printed jacket. Collectors of modern books nowadays regard the lack of a jacket in any book later than about 1920 as a serious defect. Perhaps the best-known jacket of the century, that issued for F. Scott Fitzgerald’s The Great Gatsby, shows the financial consequence of this. Without jacket, the book retails around £3,000 ($5,000); with jacket, at £100,000 ($160,000) or more.