Question:
Which position did Charles Morris hold in Jun, 1964?

Context:
 Charles Morris holds the position of Member of the 42nd Parliament of the United Kingdom from Dec, 1963 to Sep, 1964. 
 Charles Morris holds the position of Member of the 47th Parliament of the United Kingdom from Oct, 1974 to Apr, 1979. 
 Charles Morris holds the position of Member of the 44th Parliament of the United Kingdom from Mar, 1966 to May, 1970. 
 Charles Morris holds the position of Member of the 46th Parliament of the United Kingdom from Feb, 1974 to Sep, 1974. 
 Charles Morris holds the position of Member of the 43rd Parliament of the United Kingdom from Oct, 1964 to Mar, 1966. 
 Charles Morris holds the position of Substitute member of the Parliamentary Assembly of the Council of Europe from May, 1973 to May, 1974. 
 Charles Morris holds the position of Member of the 48th Parliament of the United Kingdom from May, 1979 to May, 1983. 
 Charles Morris holds the position of Member of the 45th Parliament of the United Kingdom from Jun, 1970 to Feb, 1974.

Answer:
Member of the 42nd Parliament of the United Kingdom