Rhadamanthus (1787 – after 1795) was a British

Thoroughbred The Thoroughbred is a horse breed best known for its use in horse racing. Although the word ''thoroughbred'' is sometimes used to refer to any breed of purebred horse, it technically refers only to the Thoroughbred breed. Thoroughbreds are c ...

racehorse and

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. In a career that lasted from April 1790 to 1793 he ran nine times and won five races. In the summer of 1790 he proved himself one of the best British colts of his generation, winning The Derby while still undefeated. He raced until the age of six, winning three further races. All of his runs apart from the Derby were at Newmarket.

Background

Rhadamanthus, described as either a bay or brown horse, was bred by his owner Lord Grosvenor from his mare Flyer, who went on to produce the 1794 Derby winner

Daedalus In Greek mythology, Daedalus (, ; Greek: Δαίδαλος; Latin: ''Daedalus''; Etruscan: ''Taitale'') was a skillful architect and craftsman, seen as a symbol of wisdom, knowledge and power. He is the father of Icarus, the uncle of Perdix, an ...

. Rhadamanthus and Daedalus were the most notable horses sired by Lord Grosvenor's horse Justice, who during his racing career had won two races at Newmarket.

Racing career

1790: three-year-old season

Rhadamanthus made his first racecourse appearance at Newmarket's First Spring meeting on 25 April, when he contested a division of the Prince's Stakes "Across the flat" (ten

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s). He started the

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favourite and won from

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's Lee Boo and the

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's Thunderbolt. At the next Newmarket meeting he was withdrawn from a match race against

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's colt Precipitate, with Lord Grosvenor paying a forfeit. Lord Grosvenor was strongly represented in the Derby at

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on 22 May. Apart from Rhadamanthus, the 5/4 favourite, he was also represented by Asparagus, who was second in the betting at 4/1. Ridden by John Arnull (or Arnold), Rhadamanthus beat his stable companion to win the ten runner race, with Lee Boo finishing third. Rhadamanthus was off the racecourse for almost five months before returning for two races at Newmarket in autumn. On 19 October he ran in a

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for three-year-olds over the two-mile "Ditch In" course. Starting at odds of 1/3 against six opponents, he won from the

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's colt Fitzwilliam. Rhadamanthus's unbeaten run came to an end on 1 November, when he finished second to Asparagus at level weights in a five-runner Sweepstakes Across the Flat.

1791: four-year-old season

Rhadamanthus was entered for the Claret Stakes on 13 May, but did not run. His first and only appearance in 1791 was at Newmarket's July meeting where he contested a Sweepstakes for four-year-olds over ten furlongs. He started the 5/4 favourite and won from Chanticleer, who was conceding eleven pounds, Old Gold and Caroline, earning 1,350 guineas for Lord Grosvenor.

1792: five-year-old season

Rhadamanthus's first run of 1792 came in the Oatlands Stakes, a handicap race at Newmarket over two miles on 7 April. With more than fifty subscribers paying 100 guineas to enter, the race's prize of 5,375 guineas made it far more valuable than any of the

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– the Derby for instance attracted thirty-two entries at 50 guineas for a prize of 1,600 guineas. Rhadamanthus started the 5/2 favourite in a field of twenty runners but finished unplaced behind Mr Bullock's horse Toby. Later that month Lord Grosvenor claimed a prize of 1,200 guineas when Rhadamanthus was allowed to

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in a Sweepstakes over Newmarket's Round Course, the other fifteen entries having been withdrawn Rhadamanthus made his only other start of the season at Newmarket in autumn. On 18 October he finished unplaced behind Mr Bullock's horse Halbert in a 60 guinea

weight-for-age {{use dmy dates, date=October 2022 Weight for Age (WFA) is a term in thoroughbred horse racing which is one of the conditions for a race. History The principle of WFA was developed by Admiral Rous, a handicapper with the English Jockey Club. Rous ...

race over the Ditch In course.

1793: six-year-old season

Rhadamanthus ran only once in his final season. On 30 April he received eleven pounds from Mr Wilson's six-year-old Buzzard and was beaten in a

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over the Rowley Mile course.

Stud career

By 1795, Radamanthus had been sold to William Frisby and was standing for one guinea and a half crown at various locations in

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, cycling throughout the week between

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, Stamford,

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, and

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. The only foals sired by "Rhadamanthus" in the General Stud Book were the progeny of another stallion of the same name who was foaled in 1815.

Pedigree

References

{{Epsom Derby Winners 1787 racehorse births Epsom Derby winners Racehorses bred in the Kingdom of Great Britain Racehorses trained in the Kingdom of Great Britain Thoroughbred family 1-a Byerley Turk sire line