Wynne Gibson did over 50 movies between ’29 and ’56, says Wikipedia, and most were B movies. At the moment of her appearance in the book, she was coming off “City Streets” with Gary Cooper. She never married, and was the long-time companion - which either is a euphemism, or isn’t; wish they’d be clear on that - of another Hollywood actress, Beverly Roberts.
In this short movie from 1931, she's one of the "newsmen." It's an odd comic short used in fundraising for TB and other respiratory diseases. Brought to you by Chesterfield! No, seriously. Watch it.