He was also an important broodmare sire, with modern descendants through the female line including Affirmed, Alydar and Dance Smartly.
Leviathan was a chestnut stallion of a "peculiar shade of deep red or mahogany" with a narrow blaze as his sole white marking.
The name reflected his size of 16 hands (64 inches, 163 cm), then considered very large for a Thoroughbred, and build.
He made his next start in August at Wolverhampton in the Wrottesley Stakes, defeating his only competitor, Granby, over a distance of about a mile.
He made his final start of the year in late September at Shrewsbury, beating Sancredo in the St. Leger Stakes.
He made his only start over 4 miles in the Gold Cup at Warwick, in which he defeated Euxton in a time of seven minutes flat.
[1] Leviathan was then sold for 2,000 guineas to King George IV, who was interested in winning the Ascot Gold Cup, which was rapidly increasing in prestige.
Leviathan arrived on November 14 at the stud farm of Jackson's racing partner George Elliot in Gallatin, Tennessee.
He became the first imported stallion to stand in the "west" since the Revolutionary War and helped establish Tennessee as the center of the southern bloodstock breeding industry.
In his book Making the American Thoroughbred, James Douglas Anderson stated, "Throughout the entire country he was regarded as "the modern Sir Archy.