When Tom Payten died in 1920, his son Bayly took over his father's stables at Randwick. Like his father, he was blessed with great acumen in setting horses for races that suited them. He was also a gifted tutor of apprentices; Alf Johnson, Milton Sullivan, Ray Carter, Ray Selkrig and Athol Mulley were all indentured to him. Payten was one of the first trainers to recognise the talents of Darby Munro, who became the stable's principal jockey.

During the 1920s the finest horse to pass through his stables was Valicare, who won the 1926 AJC Oaks and Doncaster Handicap, and beat the champion Windbag by eight lengths in the Rawson Stakes. In the 1930s, he trained Siren to win the 1936 VRC Wakeful Stakes, VRC Edward Manifold Stakes and VRC Oaks, and Feminist to win the 1939 Metropolitan Handicap. He also enjoyed great success with Hadrian who won for him the Canterbury Guineas, Rosehill Guineas, and Hobartville Stakes.

Payten's most successful period came in the 1940s, when he won seven trainers' premierships between 1940 and 1948.

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