Mary Loos a stroke. 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
Anita Loos a devoted admirer of H. L. Mencken and when he was in New York, she would take a break from her "Tuesday Widows" and join his circle, which included Theodore Dreiser, Sherwood Anderson, Sinclair Lewis, Joseph Hergesheimer, essayist Ernest Boyd and theater critic George Jean Nathan. Loos adored Mencken with what may have been love and preferred this group over the Round Table. She gradually realized Emerson paled in comparison to someone like Mencken, and disappointingly, high-IQ gentlemen didn't fall for women with brains, but those with more "downstairs". In 1925, on the train to Hollywood for another Talmadge picture,