William Healy Sefton was an American pole vaulter. Sefton broke the pole vault world record several times in 1937 and placed fourth in the 1936 Olympics in Berlin. Bill Sefton (United States) set the men's pole vault world record of 4.54 m in Los Angeles, U.S. on May 29, 1937. It stood 3.1 years, until Cornelius Warmerdam's 4.60 m on June 29, 1940. Wiki link