AKA Little Hartley Mare Was obtained by Lord Godolphin's stud groom in 1732 for 100 guineas from Mr Hartley.
Foaled a colt named Janus. When Janus was bred to Colonial mares bearing the blood of the Chickasaw horse, the result was the prototype of the American Quarter Horse. While it can not be said that Janus founded the breed, it can be argued convincingly that he shaped and formed it significantly. A long-course racer himself, Janus stamped his foals with speed over short distances, as well as the ability to pass that speed through successive generations. “Compactness of form, strength and power” were the traits associated with the get and progeny of Janus.https://www.aqha.com/history-of-the-quarter-horse