Original sentence: Natalie Davis has taught at Brown University, the University of Toronto, the University of  California at Berkeley, and from 1978 to her retirement in 1996, at Princeton  University, where she became the Henry Charles Lea Professor of History and director of the Shelby Cullom Davis Center for Historical Studies
Edited sentence: Natalie Davis has taught at Brown University, the University of Toronto, the University of  California at Berkeley, and from 1978 to her retirement in 1996, at Princeton University, where she became the Henry Charles Lea Professor of History and director of the Shelby Cullom Davis Center for Historical Studies