| Authorised form of name | Hay; Arthur (1824 - 1878); 9th Marquess of Tweeddale |
| Other forms of surname | Walden |
| Dates | 1824 - 1878 |
| Nationality | British |
| Place of birth | Yester, Lothian, Scotland |
| Date of birth | 09 November 1824 |
| Place of death | Walden Cottage, Chislehurst, Kent |
| Date of death | 29 December 1878 |
| Research field | Botany |
| Ornithology |
| Activity | Career:
Commission in the Grenadier Guards (1841); Aide-de-Camp to his father, Madras, India; travelled extensively in India; served in the Crimean War; retired from service; began his ornithological collections
Memberships:
FZS (President)
|
| Membership category | Fellow |
| Date of election | 08/06/1871 |
| Relationships | Second son of George, 8th Marquess of Tweeddale; took the title Viscount Walden (1862); succeeded his father (1876); married twice |
| Source | Sources:
Bulloch's Roll; DNB
Obituaries:
Proc Roy Soc 1879 vol 29 pp xxv-xxvii |
| Virtual International Authority File | http://viaf.org/viaf/58609054 |
| Code | NA8328 |
Archives associated with this Fellow
| RefNo | Title | Date |
| EC/1871/14 | Hay, Arthur, 9th Marquess of Tweeddale: certificate of election to the Royal Society | |
| MC/9/373 | Letter from Lord Walden, Chislehurst, to [Walter] White, [Assistant Secretary of the Royal Society] | 7 May 1872 |
| MC/9 | Volume 9 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1870-June 1873 |
| MC/26/233 | Letter from Marquis de Ruvigny, 15 Hanover Chambers, Buckingham Street, Strand, W.C, to Robert Harrison, Secretary-Librarian, Royal Society, Burlington House, W | 17 January 1911 |