Edward St Maur, 11th Duke of Somerset

Edward Adolphus St Maur, 11th Duke of Somerset KG FRS (24 February 1775 15 August 1855), styled Lord Seymour until 1793, of Maiden Bradley in Wiltshire and Stover House, Teigngrace, Devon, was a British landowner and amateur mathematician.


Seymour was born at Monkton Farleigh in Wiltshire, the son and heir of Webb Seymour, 10th Duke of Somerset (1718-1793) by his wife Mary Bonnell, daughter of John Bonnell, of Stanton Harcourt, Oxfordshire. He was baptised on 4 April 1775 at Monkton Farleigh,[2] with the name of Edward Adolphus Seymour, but later changed it to Edward Adolphus St. Maur, in the belief it was the original ancient form of the name.

In 1793 he succeeded his father in the dukedom. In 1795, in the company of Reverend John Henry Michell, he undertook a tour through England, Wales and Scotland, which he recorded in a journal, published in 1845.[3] The tour took him as far as the Isles of Staffa and Iona in the Hebrides. He was a patron of the Free Church of England. He was a gifted mathematician and served as president of the Linnean Society of London from 1834 to 1837 and as president of the Royal Institution from 1826 to 1842. He was also a Fellow of the Royal Society. In 1837 he was made a Knight of the Garter by Queen Victoria.[4]

In 1808 he purchased a London townhouse on Park Lane which he named Somerset House, and where he spent much of his time.[5] In addition, in 1829 he purchased from George Templer (1781-1843) the Devonshire estate of Stover in the parish of Teigngrace, near Newton Abbot, and made Stover House his principal residence, where he displayed the valuable "Hamilton" art collection brought as her marriage portion by his wife Lady Charlotte Hamilton, a daughter of the 9th Duke of Hamilton. This included paintings by Rubens, Lawrence and Reynolds.[6] The principal seat of the Seymour family had been Maiden Bradley in Wiltshire, but for one more generation it remained Stover.[7] The Stover purchase included the Stover Canal and the Haytor quarries and Haytor Granite Tramway.[8] He added a large porte cochere with Doric columns to Stover House and built a matching entrance lodge.

Somerset married twice, firstly on 24 June 1800 to Lady Charlotte Douglas-Hamilton (6 April 1772 – Somerset House, Park Lane, London, 10 June 1827), daughter of Archibald Hamilton, 9th Duke of Hamilton, by whom he had seven children:

  • Edward Seymour, 12th Duke of Somerset (20 December 1804 – 28 December 1885), eldest son and heir, of Stover House. He married beneath his social station, in his relatives' opinion, and died childless. Upon his death the dukedom passed by law to his heir male, his younger brother, with whom he had developed an enmity due to the latter having called his wife Georgiana Sheridan a "low-bred greedy beggar woman, whose sole object was to get her hands on the property and leave it away from the direct heirs".[9] The 12th Duke bequeathed Stover and its priceless contents, including the Hamilton treasures, in trust for his illegitimate grandson Harold St. Maur, which caused uproar on the part of his younger brother the 13th Duke, who considered the treasures to be family heirlooms which should have passed to him. He inherited Maiden Bradley House, presumably under an entail, but almost entirely stripped of its contents.[10]
  • Archibald Seymour, 13th Duke of Somerset (30 December 1810 – 12 January 1891), second son, who succeeded his childless brother in the dukedom.
  • Algernon St. Maur, 14th Duke of Somerset (22 December 1813 – 2 October 1894)
  • Lady Charlotte Jane Seymour (1803 – 7 October 1889), who on 31 March 1839 married William Blount (d. 27 July 1885), of Orelton, Herefordshire
  • Lady Jane Wilhelmina Seymour
  • Lady Anna Maria Jane Seymour (d. 23 September 1873), who on 13 September 1838 married William Tollemache (7 November 1810 – 17 March 1886), son of Hon. Charles Manners Tollemache of the Earls of Dysart by his wife Gertrude Florinda Gardiner.
  • Lady Henrietta Seymour

Following his first wife's death in 1827 he remarried on 28 July 1836 at Marylebone, Portland Place, London, to Margaret Shaw-Stewart, daughter of Sir Michael Shaw-Stewart, 5th Baronet of Blackhall, Renfrewshire by his wife Catherine Maxwell, daughter of Sir William Maxwell, 3rd Baronet. The marriage was childless.[11]

Somerset died at Somerset House in London, in August 1855, aged 80, and was buried at Kensal Green Cemetery, London.[12] Margaret, his second wife, died at Somerset House on 18 July 1880, and was buried with her husband.



  1. Debrett's Peerage, 1968, p.1036
  2. The Complete Peerage vol.XIIpI, p.85.
  3. Michell, John Henry, Rev. The Tour of the Duke of Somerset, and the Rev. J. H. Michell, Through Parts of England, Wales, and Scotland in the Year 1795, R. Clay, London 1845
  4. "No. 19486". The London Gazette. 21 April 1837. p. 1026.
  5. 'Park Lane', in Survey of London: volume 40: The Grosvenor Estate in Mayfair, Part 2 (The Buildings) (1980), pp. 264-289, accessed 15 November 2010
  6. Masters, Brian, The Dukes: Origin, Ennoblement and History of 26 Families, 1980, p.49
  7. Masters, Brian, The Dukes: Origin, Ennoblement and History of 26 Families, 1980, p.50
  8. M.C. Ewans, The Haytor Granite Tramway and Stover Canal, David & Charles, Newton Abbot, 1966, p. 23
  9. Masters, The Dukes, 1980
  10. Masters, The Dukes, 1980
  11. "Archived copy". Archived from the original on 2 July 2007. Retrieved 19 December 2009.CS1 maint: archived copy as title (link)
  12. Paths of Glory. Friends of Kensal Green Cemetery. 1997. p. 92.
Honorary titles
Title last held by
The Earl of Egmont
Vice-Admiral of Somerset
Peerage of England
Preceded by
Webb Seymour
Duke of Somerset
Succeeded by
Edward Seymour

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