He trained Lexington, a top racehorse of the 1850s whose excellence in competition and reputation as a sire stud continued well into the 20th century, earning the horse induction into the United States' National Museum of Racing and Hall of Fame in 1955.
"[3] Lexington's skeleton is displayed at the Smithsonian in Washington, DC and in the 1950s he was entered into the Thoroughbred Racing Hall of Fame in Saratoga Springs, New York.
By the 1861 UK Census Pryor had traveled to England, where he continued his employment as a horse trainer at Chesterfield House in Woodditton, Cambridgeshire, living with his wife Frances, sister in law Cordelia Bingaman, and 7 children.
[4] Pryor's family was still in England in 1871 and counted on the census at another racing establishment, Roden House in Compton, Berkshire.
Pryor and his family returned to the United States aboard the ship Cimbria, entering New York City on October 12, 1872.