After a short postdoctoral stint at the University of Illinois , he took a Junior Fellowship at Harvard University from 1937 to 1938 .
After a short postdoctoral stint at the University of Illinois , he remained at Harvard in various capacities for the rest of his life .
After a short postdoctoral stint at the University of Illinois , he took a Junior Fellowship at Harvard University from 1937 to 1938 , and remained at Harvard in various capacities for the rest of his life .