National Geographic : 1951 Aug
© National Geographic Society 242 Kodachrome byCharles J.Belden A Trial Heat Tests Horses and Riders on a Dangerous, Slippery Course. Excited Spectators Crowd Balconies and Rails Preliminary trials select 10 well-matched horses. Bareback riders lash one another with ox-tendon whips. Jealousiesare sofierce that thewinner sometimes requires protection. To photographers' dismay, the Piazza del Campo's main race is runat twilight.