Jules Sébastien César Dumont d'Urville (; 23 May 1790 – 8 May 1842) was a French explorer and naval officer who explored the south and western Pacific, Australia, New Zealand, and Antarctica. As a botanist and cartographer, he gave his name to several seaweeds, plants and shrubs, and places such as d'Urville Island in New Zealand. Childhood Dumont was born at Condé-sur-Noireau in Lower Normandy. His father, Gabriel Charles François Dumont, sieur d’Urville (1728–1796), Bailiff of Condé-sur-Noireau, was, like his ancestors, responsible to the court of Condé. His mother Jeanne Françoise Victoire Julie (1754–1832) came from Croisilles, Calvados, and was a rigid and formal woman from an ancient family of the rural nobility of Lower Normandy. The child was weak and often sickly. After the death of his father when he was six, his mother's brother, the Abbot of Croisilles, played the part of his father and from 1798 took charge of his education. The Abbot taught him Latin, Greek, rhetoric and philosophy. From 1804 Dumont studied at the lycée Impérial in Caen. In the library of Caen, he read the Encyclopédistes and the reports of travel of Bougainville, Cook and Anson, and he became passionate about these matters. At the age of 17 years he failed the physical tests of the entrance exam to the École Polytechnique and he therefore decided to enlist in the navy. Early years in the Navy In 1807, Dumont was admitted to the Naval Academy at Brest where he presented himself as a timid young man, very serious and studious, little interested in amusements and much more interested in studies than in military matters. In 1808, he obtained the grade of first class candidate. At the time the neglected French navy was of a much lower quality than Napoleon's Grande Armée, and its ships were blockaded in their ports by the absolute domination of the British Royal Navy. Dumont was confined to land like his colleagues and spent the first years in the navy studying foreign languages. In 1812, after having been promoted to ensign and finding himself bored with port life and disapproving of the dissolute behaviour of the other young officers, he asked to be transferred to Toulon on board the Suffren; but this ship was also blockaded in port. During this period, Dumont built on his already substantial cultural knowledge. He already spoke, in addition to Latin and Greek, English, German,