Material pasted down onto the inside of the cover board, separate from the flyleaf Doublures may be made of leather, vellum or silk, as well as paper, although they were originally made of leather only See also endpapers
reflexed continuation of dorsal exoskeleton onto ventral surface, typically as a ventral cephalic and/or pygidial rim
"A binder's term, meaning that the PASTE-DOWN (or inside lining of the covers) is not of paper but of leather, usually decorated Since doublures have always been much commoner in French bindings than in English, there is no English word for them "