'Education is the mother of wisdom and virtue' is the translation of the classical Greek motto of the Edinburgh Academy, where tonight four more contestants pit their wits against each other in the quest to become Mastermind 1983.George Beggs (retired customs official): American Civil WarBrian Cooklin (schoolteacher): Women in Thomas Hardy 's novels Alan Shearer (veterinary surgeon): Zulu War 1879John Wheeler (schoolteacher): British birds