He won a team gold medal in eventing at the 1956 Summer Olympics in Stockholm for United Kingdom .
Arthur Laurence Rook ( 26 May 1921 -- 30 September 1989 ) was an English equestrian and Olympic champion .
Arthur Laurence Rook won a team gold medal in eventing at the 1956 Summer Olympics in Stockholm for United Kingdom .
Arthur Laurence Rook ( 26 May 1921 -- 30 September 1989 ) was an English equestrian and Olympic champion .