"and had her first novel made into a silent film with Bette Davis, as well as a radio serial that was still running"
Anne Elstner and Vivian Smolen - actors in the radio serial, 'Stella Dallas'
Public DomainAnne Elstner and Vivian Smolen - actors in the radio serial, 'Stella Dallas' - Credit: National Broadcasting Company
Olive Higgins Prouty
Public DomainOlive Higgins Prouty - Credit: unknown

 Olive Higgins Prouty (1882-1974) was highly successful as an author. Her novel Stella Dallas became a bestseller in 1922, and was made into a film both in 1925 and in 1937, the 1937 version starring Barbara Stanwyck in the leading role. Stella Dallas was subsequently serialised on the radio (1937-1955).

Another of her novels, Now, Voyager (1941), was also made into a film in 1942, starring Bette Davies.

Sylvia Plath has, therefore (deliberately or accidentally) got some of her facts wrong in The Bell Jar.

Olive Higgins Prouty lived in a mansion in Brookline, a wealthy suburb of Boston, not far from the country club where Sylvia Plath's grandfather worked.