In Greek mythology, the river Phlegethon {"(river of) fire") was one of the five rivers of the underworld. It flowed with fire that burned but did not consume fuel.
... - Graham Hill, (United Kingdom)
1964 - Graham Hill, (United Kingdom)
1965 - Graham Hill, (United Kingdom)
1966 - Jackie Stewart[?], (United Kingdom)
1967 - Denny ...