 Complete the following phrase:  Herbert John Pulman 12 December 192325 December 1998 was an English professional snooker player who was the World Snooker Champion from 1957 to 1968. He won the title at the 1957 Championship, and retained it across seven challenges from 1964 to 1968, three of them against Fred Davis and two against Rex Williams. When the tournament reverted to a knockout event in 1969 he lost 1825 in the first round to the eventual champion John Spencer, and he was runner-up to Ray Reardon in 1970. He never reached the final again, although he was a losing semi-finalist in 