Question:
Which employer did Harold Ruse work for in Jan, 1958?

Context:
 Harold Ruse works for University of Southampton from Jan, 1937 to Jan, 1946. 
 Harold Ruse works for University of Leeds from Jan, 1946 to Jan, 1970. 
 Harold Ruse works for University of Edinburgh from Jan, 1928 to Jan, 1937.

Answer:
University of Leeds