Louise Marie Madeleine Fontaine
Jean-Jacques Rousseau subsequently sent an inflamed letter to Madame Dupin, who returns him expressing her concern. This doesn't stop the writer for much and only the intervention of Louise's stepson put an end to his attentions. But Madame Dupin was hardly spiteful and some months after these incidents, takes Rousseau in her service and put him in charge of the education of her son Jacques-Armand for eight days pending for a new tutor. Subsequently, the Dupins taken Jean-Jacques Rousseau as secretary after their return from Venice in 1745, when he is not yet a writer and for a modest salary. His job was to take notes and research for the book projected by Madame Dupin, namely "the defense of women in the 18th century are discussed in minor ... until they died". Madame Dupin stood Rousseau almost to a subordinate or, in the words of Grimm and Marmontel, she gives him leave the day it receives academicians. Jean-Jacques Rousseau feels bitterness after leaving his job as a secretary in 1751, but will always keep good relations with the Dupin family. Madame Dupin provides financial support to his wife, Marie-Thérèse Levasseur, who gave birth to five children abandoned by Rousseau to the Foundling Hospital. As for Louis Claude Dupin, his bound with Rousseau came for their common passion for music. The stepson of Madame Dupin was interested in physics, chemistry and natural history, hoping to integrate the Academy of Sciences and the philosopher did write an unfinished book, popular science to "Institutions of Chemistry".
Chateau and Seigneurie de Launay
Three children were born to André Guyonneau and his wife, Anne Gabrielle Harrison d’ Auvours. Two boys died as young children. A daughter, Anne Françoise, was born 1 December 1772. She married Jacques Louis Belin de Béru (twice her age at the time of their wedding in January 1796). Despite the seizure of property by the Republic, Anne was quite wealthy at the time of her marriage; her most valuable asset was the Domaine of Grandmaison. Louis was imprisoned in Paris during the Terror. He would have been executed if not for the timely fall from power of Robespierre. Louis went on to have a long and successful career in the National Assembly. He died at age 81 in 1828; Anne died 14 September 1840. At the time of her death the Domaine de Grandmaison included 125 ha. The holdings included the chateau as well as named properties: la Furetière, la Chalopinière, les Petits and Grand Guéraule and le Degoutier. Anne and Jacques de Grandmaison had no children. Thus, after eight centuries, the powerful Domaine de Launay was poised to be dismembered.