After two and a half years in exile, Voltaire returned to France, and after a few months in Dieppe, the authorities permitted him to return to Paris. At a dinner, French mathematician Charles Marie de La Condamine proposed buying up the lottery that was organized by the French government to pay off its debts, and Voltaire joined the consortium, earning perhaps a million livres. He invested the money cleverly and on this basis managed to convince the Court of Finances of his responsible conduct, allowing him to take control of a trust fund inherited from his father. He was now indisputably rich.