Cavendish (kăvˈəndĭsh) [key], pseud. of Henry Jones, 1831–99, English card game expert. Jones studied medicine, practiced in London, and retired in 1868. He became a leading authority on card games and was the first person to formulate a system of playing whist. He was the author of Principles of Whist: Stated and Explained by "Cavendish" (1862) and later wrote books on piquet, écarté, billiards, lawn tennis, and croquet.
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