Question:
Which employer did Thomas William Walker work for in Feb, 1958?

Context:
 Thomas William Walker works for University of Manchester from Jan, 1941 to Jan, 1946. 
 Thomas William Walker works for Rothamsted Research from Jan, 1939 to Jan, 1941. 
 Thomas William Walker works for King's College, Newcastle-upon-Tyne from Jan, 1958 to Jan, 1960.

Answer:
King's College, Newcastle-upon-Tyne