, 1832 Duvaucel was born in Bièvres just outside Paris to nobleman Louis Philippe Alexandre Du Vaucel, Marquis de Castelnau (1749–1794) and Anne Marie Sophie Coquet du Trazail (1764–1849). His father was a revenue collector for the king and was guillotined during the
French Revolution in 1794. Two years later his mother married
Georges Cuvier who adopted her children Alfred, Thélème (1788–1809),
Antoinette Sophie Laure (1789–1867) and Martial (1794–1871), and instilled an interest in natural history in them. He was the youngest and he was closest to his sister Sophie, with Alfred and Martial dying young. Three of the children of Cuvier died in infancy. Duvaucel served briefly in military service in 1813, posted to Antwerp in 1814 as aide-de-camp to General Lazare Carnot, and resigned from it. In 1817 he was appointed as a naturalist to the King (Naturaliste du Roi). In December 1817, Duvaucel left Le Havre, France aboard the
Seine under Captain Houssard for
British India and arrived in
Calcutta in May 1818, where he met
Pierre-Médard Diard. Together, they moved to
Chandernagore, then a trading post of the
French East India Company, and started collecting animals and plants for the
Paris Museum of Natural History. In their letters Diard and Duvaucel note the difficulties in employing Indians for work due to the restrictions of the caste system. The finally managed to get their cook to hunt, the gatekeeper to care for the garden, and for the server to catch fish for them. They employed hunters who supplied them daily with live and dead specimens, which they described, drew and classified. They also received objects from local
rajahs and went hunting themselves. In the garden of their compound, they cultivated local plants and kept
water birds in a basin. In June 1818, they sent their first consignment to Paris, containing a skeleton of a
Ganges river dolphin, a head of a
"Tibetan ox", various species of little-known birds, some mineral samples and a drawing of a
tapir from Sumatra that they had studied in
Hastings' menagerie. Later consignments included a live
Cashmere goat, crested pheasants and various birds. In December 1818,
Thomas Stamford Raffles invited them to accompany him on his journeys and pursue their collections in places where he would have to go officially. He offered to establish a menagerie in his
Bencoulen residence. By end of December, they left with him on the basis they would equally share the collected animals. In
Pulo-Pinang, they collected two new fish species and some birds. In
Achem, they collected only a few plants, insects, birds, snakes, fish and two deer. In
Malacca, they bought a bear, an
argus and some other birds. In
Singapore, they obtained a
dugong, of which they prepared drawings and a description that Raffles sent to the
Royal Society. These were published in 1820 by
Everard Home and planned for publication in the
Histoire naturelle des mammifères by
Étienne Geoffroy Saint-Hilaire and
Frédéric Cuvier. After their arrival at Bencoulen in August 1819, Raffles requisitioned most of their collection and left them copies of their drawings, descriptions and notes. Duvaucel and Diard took leave, sent their share to Calcutta and parted. But due to
political circumstances, he had to restrict his excursions to the territories of
Benares in
Bengal, and
Kathmandu in
"Nepaul". There is no record however that he ever traveled to Nepal, and the editor of the
Journal of the Asiatic Society of Bengal noted in 1836 that two of Duvaucel's collectors lived for a year with
Brian Houghton Hodgson at Kathmandu. == Death ==