. "1800Z"^^ . . "British jockey" . "Arnull, Sam"@en . . "Sam Arnull"@en . . "Sam Arnull (c. 1760 \u2013 1800) was a British flat racing jockey of the 18th century. He won the inaugural running of Britain's foremost flat race, the Epsom Derby, on Diomed, one of the most influential horses in Thoroughbred history, and won again on a further three occasions."@en . . . .