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Horse trials underway for the International Three-Day Horse Trials; Sheila Willcox riding High and Mighty, watched by Major John Birtwistle on Delagyle and Virginia Gilligan on Jungle Queen, with Colonel Harry Weldon, Windsor, England, September 28th 1955. (Photo by Douglas Miller/Keystone/Getty Images)

Horse trials underway for the International Three-Day Horse Trials; Sheila Willcox riding High and Mighty, watched by Major John Birtwistle on Delagyle and Virginia Gilligan on Jungle Queen, with Colonel Harry Weldon, Windsor, England, September 28th 1955. (Photo by Douglas Miller/Keystone/Getty Images)