Sir Thomas (horse)

In 1788 he became the first horse owned by a member of the British royal family to win The Derby, having been bought as a two-year-old by the Prince of Wales who later became King George IV.

[7] The first of these was probably the result of a match race against Aurelius which took place at the Houghton meeting in late October or early November.

[4] Sir Thomas reappeared as a four-year-old in the Jockey Stakes over the four-mile Beacon Course at Newmarket on 28 April.

Eleven of the thirteen entries were withdrawn and Sir Thomas won at odds of 1/10 from his only remaining opponent, Lord Derby's horse Director.

[9] On the following day the Prince collected a 25 guinea forfeit when Lord Grosvenor withdrew his colt by Justice from a match against Sir Thomas.

[17] On 7 May the Prince received a forfeit when Mr Wilson withdrew his horse Seedling from a three-mile match against the Derby winner.

* Sir Thomas is inbred 4D × 4D to the stallion Crab, meaning that he appears fourth generation twice on the dam side of his pedigree.