Complex sentence: Sapir's second wife, Jean Victoria McClenaghan, was sixteen years younger than him, had first met Sapir as a student in Ottawa, but had since also come to work at the University of Chicago's department of Juvenile Research.
Split into simpler sentences: Sapir's second wife, Jean Victoria McClenaghan, was sixteen years younger than he. She had first met Sapir when a student in Ottawa, but had since also come to work at the University of Chicago's department of Juvenile Research.