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Emanuel Mendes da Costa

FRS
Emanuel Mendez da Costa.jpg
Born (1717-06-05)5 June 1717
Died 31 May 1791(1791-05-31) (aged 73)
London, England
Known for British Conchology, embezzlement of Royal Society funds
Spouse(s) Leah del Prado, Elizabeth Skillman
Children One daughter by second wife
Parents
  • Abraham da Costa (Christian name John) (father)
  • Esther da Costa (Christian name Joanna) (mother)
Scientific career
Fields Botanist, naturalist, philosopher
Institutions Clerk to the Royal Society

Emanuel Mendes da Costa (5 June 1717 – 31 May 1791) was an English botanist, naturalist, philosopher, and collector of valuable notes and of manuscripts, and of anecdotes of the literati. Da Costa became infamous for embezzling funds while working at the Royal Society in London and was imprisoned.

Biography

Da Costa came from a Sephardi family that had moved to England in the 1600s from Portugal. His parents were Abraham and Esther (with the Christian names of John and Joanna). Abraham is thought to have been in the diamond business. A brother became a wealthy businessman but Emanuel worked in the office of a notary and qualified from the Scriveners' Company in 1762 but had taken an interest in natural history from around 1736. He began to trade in shells, corals and fossils and corresponded with Carl Linnaeus, Sir Hans Sloane and other naturalists of the period. Da Costa was elected one of the first Jewish Fellows of the Royal Society of London in 1747, sponsored by Martin Folkes, the Duke of Montagu, and others. In 1750 da Costa married a cousin, Leah, whose brother Abraham del Prado was a wealthy contractor for the English army, supplying food. Earlier around 1740 Abraham had employed da Costa in the Netherlands but this led to unpaid debts and resulted in da Costa's imprisonment for two years. In 1763 the death of Francis Hauksbee, who had served for forty years as clerk to the Royal Society, led to an opening that he bid for by enlisting the votes and endorsements from his friends and correspondents. He was appointed clerk, librarian and keeper of the repository and housekeeper of the Royal Society. In 1767 he was discovered to be withholding members' subscription fees, was convicted of fraud, and sentenced to five years in debtors' prison. The issue was detected when John Hope was listed as an annual instead of perpetual member and sought investigation. Da Costa would release the annual membership amount to the Royal Society but draw interest from the remainder of the life membership subscription. After release he struggled to make a living lecturing about fossils, and dealing in shells and minerals. His last scientific publication was British Conchology (1778) which included an autobiographical preface. Some friends remained loyal even after his imprisonment. These included Ingham Forster (1725–82) brother of Jacob Forster (1739-1806). Da Costa died in his home in the Strand and was buried in the Bethahaim Velho, 243 Mile End Road, London.

Da Costa was also a fellow of the Antiquarian Society of London from 1752; a member of the Botanic Society in Florence (Società botanica fiorentina), the Aurelian Society, and the Gentleman's Society at Spalding. He was married twice, first to Leah who died in 1763 without issue. His second wife Elizabeth Skillman outlived him and they had a daughter.

Works

His publications included:

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