DEBURE (Guillaume-François). Instructive bibliography: treatise on the knowledge of rare and unusual books. Paris : Guillaume-François De Bure, 1765-1768. - 7 volumes in-8, marbled calf, triple gilt fillet on the boards, spines decorated, red edges (period binding). First edition. This is the first manual for rare book lovers. It was composed by the bookseller and bibliographer Guillaume-François Debure (1732-1782) who divided it into 5 sections: Belles lettres - Histoire - Théologie - Jurisprudence - Sciences et arts. Good copy in contemporary binding. The decoration of the spines is different according to the volumes. Rubbing from use, some worm work, missing two spines. Some light spotting and rare wormholes without gravity.