Founded in 1666, the French Academie des Sciences was a prominent and prestigious organisation behind numerous scientific advances in Europe in the seventeenth and eighteenth centuries. In 1817, commissioned by the Academie, Louis de Freycinet (1779-1841) embarked on a three-year expedition with the main purpose of investigating terrestrial magnetism and taking a series of pendulum measurements. In the course of this voyage around the world, the scientists aboard the Uranie also collected an abundance of samples and made significant observations in the fields of geography, ethnology, astronomy, hydrography and meteorology. The progress of this journey was detailed by Jacques Arago (1790-1855), draughtsman on the expedition, in the form of letters to a friend. This illustrated narrative is prefaced by a report to the Academie which summarises the mission's findings. Translated into English and published in 1823, this work is an informative and often witty account, reflecting contemporary ambitions in science and exploration.