PARIS (AP) _ Jean Cau, who became a leading conservative writer after working as an assisant to liberal philosopher Jean-Paul Sartre, died of cancer Friday. He was 67.

Noted for an acerbic style, Cau was an award-winning novelist and essayist who dealt with subjects ranging from bullfighting to 20th century French intellectuals.

His novel ''God's Pity'' won the prestigious Goncourt award in 1961.

Cau was Sartre's personal secretary from 1947 to 1956, among the existentialist philosopher's most proflic periods. Cau liked to refer to himself as a ''disobedient son.''

Cau went on to contribute to conservative publications such as the weekly l'Express, Le Figaro Litteraire and Paris-Match, where he worked as a consultant until his death.

There were no details on survivors or funeral arrangements.