However, the cooperation fell apart later on in 1745. André Le Breton, the publisher commissioned to manage the physical production and sales of the volumes, cheated Mills out of the subscription money, claiming for example that Mills's knowledge of French was inadequate. In a confrontation Le Breton physically assaulted Mills. Mills took Le Breton to court, but the court decided in Le Breton's favour. Mills returned to England soon after the court's ruling. For his new editor, Le Breton settled on the mathematician Jean Paul de Gua de Malves. Among those hired by Malves were the young Étienne Bonnot de Condillac, Jean le Rond d'Alembert, and Denis Diderot. Within thirteen months, in August 1747, Gua de Malves was fired for being an ineffective leader. Le Breton then hired Diderot and d'Alembert to be the new editors. Diderot would remain as editor for the next twenty-five years, seeing the "Encyclopédie" through to its completion; d'Alembert would leave this role in 1758. As d'Alembert worked on the "Encyclopédie", its title expanded. As of 1750, the full title was "Encyclopédie, ou Dictionnaire raisonné des sciences, des arts et des métiers, par une société de gens de lettres, mis en ordre par M. Diderot de l'Académie des Sciences et Belles-Lettres de Prusse, et quant à la partie mathématique, par M. d'Alembert de l'Académie royale des Sciences de Paris, de celle de Prusse et de la Société royale de Londres." ("Encyclopedia: or a Systematic Dictionary of the Sciences, Arts, and Crafts, by a Company of Persons of Letters, edited by M. Diderot of the Academy of Sciences and "Belles-lettres" of Prussia: as to the Mathematical Portion, arranged by M. d'Alembert of the Royal Academy of Sciences of Paris, of the Academy of Sciences in Prussia and of the Royal Society of London.") The title page was amended as d'Alembert acquired more titles.