Sybil (alias of Shirley Ardell Mason)

1973 – It was written by Flora Rheta Schreiber this year. It is about a woman named Shirley Ardell Mason, who is referred to in the book by the pseudonym Sybil Dorsett.

1923 – Mason was born on the 25th day of January this year in Dodge Center, Minnesota.

1950 – She was a substitute teacher and a student at Columbia University.

1976 - A movie was also made this year based on the book, starring Sally Field in the title role and Joanne Woodward as her therapist, Dr. Cornelia B. Wilbur.

1998 – She died on the 26th day of February this year because of breast cancer.