Mary Loos Mary Loos Mary Loos (May 6, 1910 – October 11, 2004) was an American actress, screenwriter and novelist. She was occasionally credited under her full name, Mary Anita Loos. Born in San Diego, she was the daughter of Dr. Clifford Loos, co-founder of the Ross-Loos Medical Clinic and the Ross-Loos Medical Group, the first Health maintenance organization (HMO) in the United States. She was the niece of screenwriter Anita Loos. She was both co-creator and one of the writers for "Yancy Derringer" (1958-1959), an American Western TV series. Mary Loos died in Monterey, California, aged 94, due to complications following
Anita Loos her work; he was, in the words of his wife, "a man who enjoyed ill health." It was the opinion of New York's leading psychiatrist, Smith Ely Jelliffe, that she was to blame and that in order for Emerson to "get better" she would have to give up her career. She resolved to retire after her next book, "But Gentlemen Marry Brunettes", a sequel to "Blondes" she had promised "Harper's Bazaar". On the further advice of the psychiatrist, the couple had planned another European vacation. At the last minute, Emerson feigned being unwell and insisted Loos continue alone. Arriving in