"[2]The leading racehorse trainer of his time, he raised their status from glorified groom to professional.
[citation needed] He was based initially at Lewes where he was private trainer to Sir Ferdinand Poole from 1793.
He then spent rest of his career at Newmarket and trained six more Derby winners - Tyrant, Pope and Whalebone for the 3rd Duke of Grafton, Whisker for the 4th Duke of Grafton, Mr Payne's Azor and Mr Udney's Emilius.
To his contemporaries he was known as "the Emperor of Trainers" and his horses benefited from a gentler regime from that then practised by most stables.
[citation needed] He continued to live in Newmarket after his retirement in 1828, when, as a testimonial, members of the Jockey Club presented him with a piece of plate.