Riddlesworth was owned by George Child Villiers, 5th Earl of Jersey, and trained by James Edwards.
As a stallion he stood in Germany and the United States, but didn't leave many notable foals.
Riddlesworth was a chestnut colt, with a white blaze, bred by George Child Villiers, 5th Earl of Jersey,[1] and foaled in 1828.
After retiring from racing Emilius became a successful stallion and was champion sire of Great Britain and Ireland in 1830 and 1831.
[6] Three days later he beat Vestris to win the one-mile Dinner Stakes, this time being ridden by James Robinson.
His closest rivals in the betting were Vestris at 12/1, Blunderer at 16/1 and Bras de Fer at 20/1.
Commenting on some peoples suggestion that it was a "bad year for horses", one reporter for the Sporting Magazine wrote: "I, who am not a fashionable man, contend that it is the superiority of Riddlesworth that makes them only look so.
After being briefly brought back to England he was sold to Dr. John Nott and sent to Alabama in the United States.
[18] Riddlesworth died in early 1843 at J.L Bradley's stable in Lexington, Kentucky[19] of pneumonia.