Henry Petty-Fitzmaurice
In 1801 Dumont travelled over various parts of Europe with Henry Petty-Fitzmaurice, 3rd Marquess of Lansdowne, and on his return settled down to the editorship of Bentham's works. In 1814 the restoration of Geneva to independence induced him to return there, and he soon became leader of the supreme council. He devoted particular attention to the City's judicial and penal systems, and many improvements on both are due to him.