Guillaume de L'Isle (1675 - 1726)
L'Isle was the leading French cartographer of the C18th and renowned for the accuracy of his maps. He studied under Jean Cassini and from an early age showed his talent. At the age of 27 Delisle was admitted to the Academie Royale des Sciences and by 1718 he had been made the Royal Geographer. His maps reflect his scientific approach to map making by including the most up to date cartographic information as well as the use of new astronomical information. Where he was unable to verify information conclusively, he would note the fact on his maps.
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Jean Claude Dezauche (1745 - 1824)
Dezauche was an engraver and publisher who had acquired the stock of a number important French mapmakers. Delisle’s business was inherited by his son-in-law Philippe Buache, on his death, his widow sold his work to Jean Nicholas Buache de la Neuville, and then in 1780 Dezauche bought it from him together with work by Delisle, Jaillot and others.
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