ROUSSEAU (Jean-Jacques). Collection complètes des Oeuvres de J.J. Rousseau, citoyen de Genève. Genève, s.n. [Société typographique], 1782. 15 vol. in-4° bound in full shagreened fawn basane, spines gilt and decorated (contemporary binding). The last two supplement volumes are missing. An important edition of Rousseau's works, published by Du Peyrou, a friend of Rousseau. Our copy contains no engravings from the Brussels edition, apart from 10 pages of music score in vol. 8, and 13 folding music plates in vol. 9. Armorial bookplate of Henri Tronchin Provenance: Tronchin-Givaudan library, then by descent to the present owners Good condition Binding: Spine lightly rubbed with some loss to binding Lack of gilding and epidermis on several headpieces Corners dented but not missing A few scratches and scuffs on the boards, not serious. Inside pages: Generally clean, some scattered freckling in certain volumes, some brown pages, some rare minor tears in the margins. For volumes 2 to 9: The title pages linking volumes 2 to 9 to the 1782 edition are missing, making our copies start directly from the false-title and title with an earlier edition date (1780 for vols. 2 to 5, 1781 for vols. 6 to 9). This is not particularly annoying, as the title appears in spite of everything, as often happens with this edition. Qlqqes reversals of pages in some volumes or pagination errors, without lacks Collation: Vol 1: [4] ff, 7 pp, 539 pp, [1]p. Vol 2: [2] ff, XLVII pp, 548 pp. vol 3: [2] ff. 537 pp. vol. 4: [2] ff. 485 pp. Vol. 5: [2] ff. 537 pp. vol. 6: 118 pp, [1] f., pp. 119 to 633, [1] f. vol. 7: [1] f., 114 pp, [1] f. pp. 115 to 198, [1] f. Vol. 8: XXX pp, [1] f., 583 pp, [1] p. + X pp. of music between pp.178 and 179 + [1] folding leaf General table of all tones and keys between pp.353 and 354 Vol. 9: XIV pp, [1] f., 772 pp, [13] fold-outs of music vol. 10: [2] ff, 717 pp, [1] f. Vol. 11: [2] ff. 466 pp. vol. 12: [2] ff. 679 pp. vol. 13: [2] ff. 614 pp. Vol. 14: [2] ff. 575 pp. and [1] p. vol. 15: [2] ff. 619 pp. Tronchin- Givaudan Library Assembled and preserved by several generations of the Tronchin and Givaudan families, the Tronchin-Givaudan library bears witness to a deep commitment to knowledge, historical awareness and the exceptional. The selection we have the honour of offering at auction highlights a subtle balance between erudition and the art of living. Comprising mainly works from the eighteenth and twentieth centuries, this collection covers more than five centuries of printed production, closely linked to the history of Geneva and the Tronchin family, one of the city's great patrician lineages, now extinct. A number of seventeenth-century titles hark back to the origins of this lineage, notably around the figure of Théodore Tronchin (lot 2567). However, it was in the 18th century, with the acquisition of the Bessinge estate by Jacob Tronchin in 1764, that the collection really took shape. The works, many of which bear the bookplates of Jean Armand Tronchin (1732-1813) and his son Henri (1794-1865), make up a collection faithful to the ideals of the Enlightenment, combining public law, classical humanities, science, travel accounts (lots 2471, 2479, 2554..), major works of 18th-century printing - including the plan of Paris by Turgot (lot 2591) - and rare editions bearing the royal coat of arms, such as those of Madame de Pompadour (lot 2545). At the turn of the 20th century, a new page was turned when Xavier Givaudan (1867-1966), a leading figure in the industrial boom alongside his brother Léon Givaudan (1875-1936) in the fields of synthetic perfume, chemicals and soap, established in Switzerland in 1917, acquired the estate in 1938 after renting it for several years. The library and works have been preserved and in part passed on to his descendants. His brother Léon Givaudan built up a bibliophile collection focusing on Art Deco books, bringing together works sublimated by bindings signed by the great contemporary bookbinders (lots 2606, 2626, 2648, etc.). His library was sold at auction in Paris on 3 June 1988. André Givaudan (1895-1973), Xavier Givaudan's son, also had a particular interest in literature, joining several bibliophile societies and adding a number of modern illustrated books to the collection. All the lots marked in brown in the printed catalogue come from the Tronchin-Givaudan Collection, then by descent to the current owners.