Note 109 — Chapter IV
Reading edition
M. Dupin deserves honourable mention as having helped the editors of the Encyclopædia by procuring information for them as to salt-works (D'Alembert's Discours Préliminaire). His son M. Dupin de Francueil, it may be worth noting, is a link in the genealogical chain between two famous personages. In 1777, the year before Rousseau's death, he married (in the chapel of the French embassy in London) Aurora de Saxe, a natural daughter of the marshal, himself the natural son of August the Strong, King of Poland. From this union was born Maurice Dupin, and Maurice Dupin was the father of Madame George Sand. M. Francueil died in 1787.