Question:
Which position did Enoch Powell hold in Sep, 1958?

Context:
 Enoch Powell holds the position of Member of the 45th Parliament of the United Kingdom from Jun, 1970 to Feb, 1974. 
 Enoch Powell holds the position of Shadow Secretary of State for Defence from Jul, 1965 to Apr, 1968. 
 Enoch Powell holds the position of Member of the 44th Parliament of the United Kingdom from Mar, 1966 to May, 1970. 
 Enoch Powell holds the position of Secretary of State for Health and Social Care from Jul, 1960 to Oct, 1963. 
 Enoch Powell holds the position of Financial Secretary to the Treasury from Jan, 1957 to Jan, 1958. 
 Enoch Powell holds the position of Member of the 40th Parliament of the United Kingdom from Oct, 1951 to May, 1955. 
 Enoch Powell holds the position of Member of the Privy Council of the United Kingdom from Jan, 1960 to Jan, 1960. 
 Enoch Powell holds the position of Member of the 43rd Parliament of the United Kingdom from Oct, 1964 to Mar, 1966. 
 Enoch Powell holds the position of Member of the 39th Parliament of the United Kingdom from Feb, 1950 to Oct, 1951. 
 Enoch Powell holds the position of Member of the 41st Parliament of the United Kingdom from May, 1955 to Sep, 1959. 
 Enoch Powell holds the position of Member of the 42nd Parliament of the United Kingdom from Oct, 1959 to Sep, 1964. 
 Enoch Powell holds the position of Member of the 47th Parliament of the United Kingdom from Oct, 1974 to Apr, 1979. 
 Enoch Powell holds the position of Member of the 48th Parliament of the United Kingdom from May, 1979 to May, 1983. 
 Enoch Powell holds the position of Member of the 49th Parliament of the United Kingdom from Jan, 1986 to May, 1987.

Answer:
Member of the 41st Parliament of the United Kingdom