Thomas Darley (born 19 May 1664) served as Her Majesty's Consul to the Levant (Syria) during the reign of Queen Anne. He is famous for having bought an Arabian colt that became an important part of the history of the Thoroughbred breed.
Darley was born in Aldby Park, Yorkshire, England. His father was Richard Darley and his mother Dorothea was a daughter of the regicide Thomas Waite (Wayte).
In 1702 Darley while in Syria bought an Arabiancolt from Sheikh Mirza for his father, Richard Darley. There are conflicting stories about how much Darley exchanged or paid for the colt but had made arrangements to send him back to Yorkshire. The colt was foaled in Syria, late March or early April in the year 1700. The horse, a bay, was tall for an Arabian horse of the time was 15 hands when described by Darley in a letter to his brother dated 21 December 1703. The horse whose original name was "Ras el Fedowi," translated as "The Headstrong One", became immortalised as the "Darley Arabian".
In Thomas Darley's own words, "he was immediately striking owing to his handsome appearance and exceedingly elegant carriage". Although he never raced, he covered mares at Aldby Park from 1705 until 1719, and lived until the advanced age of 30. His genes added speed to those of stronger English horses of the time. Through his offspring, including his great grandson, the famous and never beaten Eclipse, he has had the greater influence of the three foundation stallions of the thoroughbred breed. His bloodline is said to be present in about 95% of today's thoroughbred racehorses.