Question:
Which employer did David Newth work for in May, 1961?

Context:
 David Newth works for University College London from Jan, 1947 to Jan, 1960. 
 David Newth works for Middlesex School from Jan, 1960 to Jan, 1965. 
 David Newth works for University of Glasgow from Jan, 1965 to Jan, 1981.

Answer:
Middlesex School