Had Mrs. Inglethorp discovered something between her and Bauerstein, and threatened to tell her husband? 
Mrs. Inglethorpy had investigated, but could find no link between Bauerstein and her.
mnli hypothesis: Mrs. Inglethorpy had investigated, but could find no link between Bauerstein and her. premise: Had Mrs. Inglethorp discovered something between her and Bauerstein, and threatened to tell her husband? 