Louis Claude Desaulces de Freycinet (1779-1842) was a French marine officer and explorer, who participated in several significant early 19th-century expeditions to relatively unknown areas in the southern hemisphere. In 1800, he joined one of the most important early explorations of Australia, which was commissioned by the French government and commanded by Nicholas Baudin (1754-1803). On this voyage, which included stops in Mauritius and Tasmania, Freycinet served as a surveyor and was responsible for conducting a thorough cartographic survey of the Australian coast. Upon returning to France years later, he completed a detailed account of the journey begun by the naturalist Françis Péron that was published as Voyage de decouvertes aux Terres Australes between 1807 and 1816.

In 1817, Freycinet embarked on the Uranie on a major scientific expedition around the world to record information regarding the geography, meteorology, terrestrial magnetism, ethnology, and indigenous flora and fauna of various locations in the southern hemisphere. Accompanied by the talented artist Jacques Arago, he explored the Sandwich Islands, the Hawaii Islands as well as Rio de Janeiro, the Cape of Good Hope, Tonga, Gibraltar, Tenerife, Mauritius, Timor, Tierra del Fuego, Montevideo, Mauritius, New South Wales, and the Caroline Islands. After being shipwrecked near the Falklands, Freycinet eventually returned to Paris on the Physicienne in 1820, where he published a comprehensive illustrated account of the expedition in a colossal thirteen-volume work entitled Voyage Autor de Monde.

Louis lsidore Duperry a French naval officer was born in Paris, 21 October 1786 and died there on the 10th of September 1865. 
He entered the French navy in 1802, was promoted 2nd lieutenant, and sailed in 1817 for a voyage round the world in the corvette " Uranie," under the command of Louis Claude Desaules De Freycinet, which was wrecked on the Malouine islands. Duperrey was picked up by a passing American vessel, returned to France, and was promoted to 1st lieutenant. 
In 1822 he received his commission as captain, and, in command of the corvette "La Coquille," sailed on a scientific expedition to the South American coasts and the Pacific Ocean, from which he returned on 24 March 1825. During that time he  repeatedly visited the coasts of Chili and Peru from where he sent to the navy department interesting reports upon the geology and institutions of those countries, and brought home many thousand zoological and botanical specimens. 
The observations of many Pendulum Measurements taken during this voyage at many different points proved the flattening of the earth at the poles, Duperrey also determined the position of the magnetic poles and the figure of the magnetic equator. 
He designed charts of the coast of South America that are valued, especially one showing the bifurcation of the current at the mouth of the Plate. Duperrey in 1836 was appointed officer of the Legion of Honor, and in 1842 a member of the French academy. He published Voyage autour du Monde....pendant les annes 1822 - 25 in Paris between 1826 & 1830. (Ref: Tooley; M&B)

General Description:
Paper thickness and quality: - Heavy and stable
Paper color: - off white
Age of map color: - Original
Colors used: - Blue, yellow, red
General color appearance: - Authentic
Paper size: - 19in x 12 1/2in (485mm x 320mm)
Plate size: - 12 1/2in x 9 1/2in (315mm x 240mm)
Margins: - Min 2in (50mm)

Imperfections:
Margins: - None
Plate area: - Light text offsetting
Verso: - None