Last updated
Diomed by John Nott Sartorius.jpg
Diomed "the Marvel"
Sire Florizel
Grandsire Herod
DamMare (1763) by Spectator
Sex Stallion
Country Kingdom of Great Britain
Breeder Honorable Richard Vernon of Newmarket
Owner Sir Charles Bunbury, 6th Baronet
Record20: 11-5-3
Major wins
Epsom Derby (1780)
Diomed Stakes at Epsom Downs Racecourse
Last updated on August 24, 2007

Diomed, foaled in 1777, was an English Thoroughbred race horse who won the inaugural running of the Derby in 1780. He was subsequently a successful sire in the United States.


Racing years

A bright chestnut standing 15 hands 3 inches [1] he was named after the Ancient Greek hero Diomedes. By the unraced Florizel out of the unraced Pastorella's Dam, aka Sister to Juno (both going back to the Godolphin Arabian, and Sister to Juno going back as well to the Darley Arabian), Diomed was bred by the Hon. Richard Vernon and owned by Sir Charles Bunbury, [1] then trained by him at Hilton Hall. He was started 19 times, winning 11 races, finishing second in 4, and third in 3.

Of these eleven wins, ten were consecutive, which included the inaugural running of The Derby in 1780. [2] During these early bright years of Diomed's life, he was considered by many to be the best colt seen in the Britain since Eclipse.

He was allowed to rest for a while, but when he was brought back to the races, he wasn't the same horse. Sometimes he would win, and sometimes he wouldn't win, and more often the latter than the former. His last win was a King's Plate in four mile heats carrying 168 pounds.


Sir Charles retired Diomed to stud. His fee was five guineas, or about $25. (In England Diomed sired Grey Diomed who went to Russia where he was a great success, and also Young Giantess, who foaled Sorcerer and Eleanor. [1] ) There were few takers, and for the next decade or so, Diomed's fee went down and down until, by the age of 21, it was two guineas. By then, there were virtually no takers, so the old stallion did nothing but graze alone. [3]

In the United States

Diomed Diomed.jpg

Sir Charles offered Diomed for sale when the stallion was 21 years old. Colonel John Hoomes of Bowling Green, Virginia bought him for $250, and then shipped him to Virginia where he was returned to stud in 1798. Aside from importing bloodstock into the US, Hoomes also maintained his own racing stable and sizeable stud service in which his good friend, the leading national horseman of the time, John Tayloe III, was a partner. Although Hoomes and Tayloe's English agent wrote Hoomes a letter stating very clearly that Diomed was "...a tried and true bad foal-getter," and strongly recommending he not be put to stud, they were unswayed. Besides being personally impressed with the horse, a stallion of Tayloe's had also recently hurt himself, and Tayloe was in immediate need of a stud to replace him. Diomed went to work. [3]

In those days, stallions did not stand in one place, but moved from stud farm to stud farm. Diomed lived like this until he was thirty-one years old and was active to his final days. His fee increased with his fame and his fame increased so quickly that Hoomes was able to sell a share in him for six times his purchase price soon after he landed on American soil. [3]

Diomed, along with Medley, Shark, and Messenger, were the four most important stallions introduced into early American bloodstock. Diomed's offspring competed with many of the greatest horses in American turf history: Haynie's Maria, who beat every horse she met until she was nine, and about whom Andrew Jackson said, "...Haynie's Maria can beat anything in God's whole creation," [3] the undefeated Ball's Florizel (famous for his bad temper), Potomac, Duroc (sire of American Eclipse), and surely his greatest son of all, Sir Archy. Sir Archy had a huge influence on Thoroughbred history, siring the line which led to Timoleon, Boston, and Lexington. His descendants include Black Caviar, Phar Lap, Secretariat and American Pharoah. Furthermore, Diomed's influence has been felt through his sons regarding the development of the breeds American Quarter Horse (Sir Archy) and Standardbred (Duroc). [4] [5] [6] [7] [8]

At Diomed's death at the age of 31, it was reported, "...there was as much mourning over his demise as there was at the death of George Washington." [3]

Sire line tree

  • Diomed [9] [10] [11] [12]
    • Centinel
    • Peacemaker
    • Stump-the-Dealer
    • Grey Diomed
    • Glaucus
    • Anthony
    • Sir Charles
    • Wrangler
    • Albemarle
    • Hamlintonian
      • Diomed (Darnaby)
      • Hamlintonian (Hancock)
      • Hamlintonian (Davis)
        • Randolph
    • Top Gallant
    • Truxton
    • Wonder
      • Tennessee Oscar
        • Columbus
        • Bolivar
    • Diomed (Lawrence)
    • Diomed (Ragland)
    • Diomed (Randolph)
    • Florizel (Ball)
      • Tuckahoe
      • Orphan
      • Florizel (Turpin)
      • Richmond
      • Enterprise
    • Vingt'un
    • Diomed (Kennedy)
    • Grey Diomed (Barksdale)
    • Eclipse
    • Monroe
    • Potomac
      • Little John
    • Sir Archy [13] [14]
      • Cicero
      • Sir Arthur
      • Director
        • Aratus
          • John Henry
      • Grey Archy
      • Spring Hill
      • Tecumseh
      • Young Sir Archy
      • Columbus
      • Warbler
      • Walk-In-The-Water
      • Timoleon
        • Washington
        • Marquis
        • Sir John Falstaff
        • Jackson [15]
        • Boston [16]
          • Arrow
          • Wade Hampton
          • Arlington
          • Cost Johnson
          • Ringgold
          • Commodore
          • Red Eye
          • Cracker
          • Big Boston
          • Jack Hawkins
          • Bob Johnson
          • Lecomte
          • Lexington
          • Piketon
          • Zero
      • Carolinian
      • Contention
      • Kosciusko
        • Pulaski
        • Clermont
          • Minor
        • Woodford
        • Romulus
        • Greybeard
      • Napoleon
      • Virginian
        • Byron
        • Mercury
        • Sidi Hamet
          • Berthune
          • Andrew Hamet
      • Rattler
        • Marylander
      • Sir Charles
        • Collier
        • Andrew
          • Count Zaldivar
        • Frank
          • Jim Bell
        • Wagner
          • Oliver
          • Voucher
          • Monte
          • Cary Bell
          • Ashland
          • Charley Ball
          • Wagner Joe
          • Jack Gamble
          • Red Jacket
          • Starke
          • Endorser
          • Joe Stoner
          • Neil Robinson
          • Rynodyne
      • Sir William
      • Childers
      • Roanoke
        • Grey Beard
          • Santa Anna
        • John Hancock
      • Muckle John
      • Sumpter
        • Almanzor
        • Brunswick
      • Henry
        • Robin Hood
        • Gerow
      • John Richards
        • Corsica
      • Stockholder
        • Pumpkin Boy
          • Tempest
      • Arab
      • Bertrand
        • McDonough
        • Richard Singleton
        • Woodpecker
          • Grey Eagle
        • Bertrand Jr.
          • Hero
        • John Bascombe
        • Gauglion Gangle
      • Cherokee
        • Whalebone
          • Arnold Harris
      • Marion
        • Cymon
        • John Blount
      • Phoenomenon
      • Sir Richard
      • Sir William of Transport
        • Sir Leslie
          • Celestian
          • Gazan
        • Plato
      • Robin Adair
      • Gohanna
      • Occupant
        • Waxy
      • Pacific
        • Epsilon
          • Castor
          • Bill Alexander
          • Memnon
      • Saxe Weimer
      • Crusader
      • Sir Archy Montorio
        • Rodolph
      • Giles Scroggins
      • Industry
        • Goldboy
      • Merlin
      • Red Gauntlet
      • Tarriff
      • Hyazim
      • Wild Bill
        • Gandor
      • Copperbottom [4] [5]
        • Golddust [18]
        • Rock
          • Rocket
        • Copperbottom (Captain Edwards) [19]
          • Copperbottom (Rucker) [20]
      • Longwaist
      • Zinganee
        • George Martin
    • Virginius
    • Muzzle Diomed
    • Duroc [6]
      • Sir Lovell
      • Trouble
      • Marshal Duroc
        • Marshall Bertrand
      • American Eclipse [21]
        • Forward
        • Goliah
        • Paul Clifford
        • Constellation
        • Orphan Boy
        • Lance
        • Mambrino
        • Druid
        • Eclipse (Monmouth)
          • Hornblower
          • Prospect
        • Godolphin
        • Medoc
          • Grey Medoc
          • Mirabeau
          • Sir Halpin
          • Bendigo
          • Blacknose
          • Cripple
          • Red Bill
          • Telamon
          • Bob Letcher
        • Shark
          • Mariner
        • Cadmus
        • Mingo
        • Tom Moore
        • Job
        • Sufferer
        • Ecliptic
        • Vincente Nolte
        • Zenith
        • Eclipse (Brawner)
        • Eclipse (Trimble)
        • St. Charles
      • Cock of the Rock
      • Romp
      • American Star [22] [23]
        • American Star 14 [24]
    • Gracchus
      • Rob Roy
      • Fredericksburg
    • Madison
    • Doublehead
    • Constitution

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  1. 1 2 3 Ahnert, Rainer L. (editor in chief), “Thoroughbred Breeding of the World”, Pozdun Publishing, Germany, 1970
  2. "Hunting. Dunedin Hounds". 20 July 1893. p. 31. Retrieved 16 April 2018 via Papers Past.
  3. 1 2 3 4 5 “The History of Thoroughbred Racing in America,” by William H.P. Robertson, Bonanza Books, New York
  4. 1 2 Copperbottom
  5. 1 2 Lost Bloodline
  6. 1 2 Duroc
  7. American Star Details
  8. History of the Quarter Horse
  9. Byerley Turk Line
  10. Herod Sire Line
  11. Florizel
  12. Diomed
  13. Sir Archy HOF
  14. Sir Archy
  15. Jackson Pedigree
  16. Boston
  17. Union Pedigree
  18. Golddust Pedigree
  19. Captain Edwards Copperbottom Pedigree
  20. Rucker's Copperbottom Pedigree
  21. American Eclipse
  22. American Star
  23. American Beginnings
  24. American Star 14
  25. Lefrevre Star Pedigree
  26. Alpha Pedigree
  27. Well's American Star Pedigree
  28. Americus Pedigree
  29. Black Star Pedigree
  30. Brown Dick's Sire Pedigree
  31. Idaho Pedigree
  32. Jersey Star Pedigree
  33. Jim Waldron Pedigree
  34. Carpenter's Star Pedigree
  35. Goldsmith's Star Pedigree
  36. Walter Jones Pedigree
  37. Sir Henry Pedigree
  38. Star of Catskill Pedigree
  39. Coleman's Star Pedigree
  40. Star 78 Pedigree
  41. Haven's American Star Jr Pedigree
  42. J K Pedigree
  43. Fogg's Star Pedigree