Milestones, Jul. 9, 1951

Divorced. Robert Penn Warren, 46, Rhodes scholar, poet turned professor, and Pulitzer Prize novelist (All the King's Men); and Emma Brescia Warren, fortyish; after almost 21 years of marriage; in Reno.

Died. John Sheldon Olliff, 41, former British indoor tennis champion and Davis Cup player, who became one of Britain's top tennis correspondents (for the London Daily Telegraph); after a heart attack while on his way to cover the Wimbledon matches; in London.

Died. Leroy August Wilson, 50, who graduated from Indiana's Rose Polytechnic Institute in 1922, three days later went to work as a $110-a-month traffic clerk for Indiana Bell Telephone Co., 26 years later was elected the $125,000-a-year president of the world's largest ($12 billion assets) corporation, the American Telephone & Telegraph Co.; after long illness; in Manhattan (see BUSINESS & FINANCE).

Died. Peter Cheyney, 55, British crime novelist (Your Deal My 'Lovely, Dark Interlude), who began writing thrillers about U.S. gangsters and "private eyes" to win a £5 bet, eventually sold millions of copies, earned close to $1,000,000; of a heart attack; in London.

Died. Admiral Count Luigi Rizzo di Grado, 63, one of Italy's most renowned naval heroes of World War I (only holder of two Medaglie d'Oro, highest Italian war decoration); of a lung ailment; in Rome. In December 1917, Rizzo and a small commando force sneaked into Trieste's harbor, cut the torpedo nets, then returned with small boats to sink Austria's battleship Wien, next year equaled the feat by torpedoing the Szent-Istvan,

Died. Grace Hall Hemingway, 79, who married a doctor, bore him six children, the second of whom was Author Ernest Hemingway; after long illness; in Memphis, Tenn.

Died. John Wilkinson, 83, who in 1902 developed the U.S.'s first efficient air-cooled internal-combustion engine (used only on the now-extinct Franklin), with Henry Ford founded the Society of Automotive Engineers; of arteriosclerosis; in Syracuse, N.Y.

Died. David Warfield, 84, U.S. matinee idol during the first quarter of the century (The Return of Peter Grimm, The Music Master, The Merchant of Venice), who through wise investments became one of the world's richest actors; after long illness; in Manhattan. Starting as a theater usher in San Francisco, he went to New York in 1889, first found work as a saloon entertainer, was later starred by famed Producer David Belasco, with whom he had a falling out in 1924, after which he quit the stage.