| Authorised form of name | Jeffreys; John Gwyn (1809 - 1885); lawyer and conchologist |
| Dates | 1809 - 1885 |
| Nationality | British |
| Place of birth | Swansea, Glamorgan, Wales |
| Date of birth | 18 January 1809 |
| Place of death | 1 The Terrace, Kensington, London, England |
| Date of death | 24 January 1885 |
| Occupation | lawyer and conchologist |
| Research field | Malacology |
| Conchology |
| Marine zoology |
| Activity | Education: Bishop Gore School, Swansea grammar school; Lincoln's Inn.
Career:
Apprentice at a solicitors in Swansea (1826); qualified as a barrister (1838); called to the bar (1856); pursued his passion for conchology and the biology of molluscs; retired from the legal profession (1886); partook in dredging operations in the Irish Sea, the English Channel, seas around Hetland Islands, and the west of Scotland, as well as expeditions in Norway; partook in the Porcupine expeditions (1869-1870); Valorous expedition to Greenland (1875); French Travailleur expedition (1880); moved from London to Aware, Hertfordshire, and bought the Greyfriars Priory which turned into a meeting place for British and foreign artists (1866); Justice of the Peace for Glamorgan, Brecon, and Hertfordshire (1877); died of apoplexy. |
| Membership category | Fellow |
| Date of election | 02/04/1840 |
| Age at election | 31 |
| Proposer | Lewis Weston Dillwyn; John Montgomery Traherne; James Ebenezer Bicheno; John Dillwyn Llewelyn; John Henry Vivian; Christopher Rice Mansel Talbot; Henry Thomas de la Beche |
| Relationships | Parents: John Jeffreys (d. 1815), solicitor, and Martha Tringham.
Spouse: Ann Nevill (d. 1881) of Llangennech Park, Carmarthenshire (21 April 1840).
Son in law: Henry Nottidge Moseley (FRS 1877)
Chidlren: One son and four daughters. |
| Published works | RCN 46103 |
| General context | Known for his work on British and Mediterranean Mollusca. |
| Sources | Sources:
Bulloch's Roll; DNB; DSB
Obituaries:
Proc Roy Soc 1884-1885 vol 38 pp xiv-xviii signed by W B C |
| Virtual International Authority File | http://viaf.org/viaf/32115498 |
| Royal Society code | NA1658 |
| Reference number | Title | Date |
| EC/1840/11 | Jeffreys, John Gwyn: certificate of election to the Royal Society | |
| IM/Maull/002416 | Jeffreys, John Gwyn | nd |
| RR/7/452 | Referee's report by Albert Charles Gotthilf Lewis Gunther, on a paper 'Preliminary report of the biological results of a cruise in H. M. S. 'Valorous’ to Davis Strait in 1875' by John Gwyn Jeffreys | 4 August 1876 |
| RR/7/453 | Referee's report by Charles Thomas Wyville Thomson, on a paper 'Preliminary report of the biological results of a cruise in H. M. S. 'Valorous’ to Davis Strait in 1875' by John Gwyn Jeffreys | 10 August 1876 |
| MC/9/479 | Letter from J [John] Gwyn Jeffreys, 25 Devonshire Place, Portland Place, to Walter White, [Assistant Secretary of the Royal Society] | 23 January 1873 |
| MC/9/13 | Letter from J [John] Gwyn Jeffreys, 25 Devonshire Place, Portland Place, to Mr [George] Bentham | 22 January 1870 |
| MC/10/312 | Letter from J [John] Gwyn Jeffreys, 33 Grosvenor Street, to Dr [Joseph Dalton] Hooker, [President of the Royal Society] | 3 December 1875 |
| MC/9/414 | Letter from Wm H [William Healey] Dall, US Coast Survey, Office of the US Coast Survey, San Francisco, California, to J [John] Gwyn Jeffreys | 6 October 1872 |
| MC/9/429 | Letter from J [John] Gwyn Jeffreys, 25 Devonshire Place, Portland Place, to [William Sharpey and George Gabriel Stokes], Secretaries of the Royal Society | 6 November 1872 |
| MC/9 | Volume 9 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1870-June 1873 |
| MC/10/287 | Letter from John Gwyn Jeffreys, Ware Priory, Hertfordshire, to [Joseph Dalton Hooker], President of the Royal Society | 8 October 1875 |
| MC/10 | Volume 10 of miscellaneous correspondence regarding business matters, sent to the Royal Society | July 1873-1876 |
| MC/11/104 | Letter from J [John] Gwyn Jeffreys, Ware Priory, Hertfordshire, to the Secretary of the Admiralty | 6 October 1877 |
| MC/11/131 | Letter from J [John] Gwyn Jeffreys, Athenaeum Club, Pall Mall, to [Joseph Dalton] Hooker, [President of the Royal Society] | 7 December 1877 |
| MC/11/127 | Letter from J [John] Gwyn Jeffreys, Ware Priory, Hertfordshire, to [Joseph Dalton Hooker], President of the Royal Society | 1 December 1877 |
| AP/37/1 | Paper, 'Notes on British Foraminifera' by John Gwyn Jeffreys | 18 June 1855 |
| MC/11 | Volume 11 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1877-1879 |
| PP/3/19 | Paper, 'Remarks on the soundings and temperatures obtained in the Faeroe [Faroe-Shetland] Channel during the summer of 1882' by T H Tizard | 1883 |
| MS/257/2/345 | Letter from John Gwyn Jeffreys, Galway to Edward Sabine | 7 June 1869 |
| MC/17/353 | Letter from [Sir Charles Thomas] Wyville Thomson, to [John] Gwyn Jeffreys | c. March 1872 |