Engaged. Clarence M. Kelley, 64, FBI director, and Shirley Dyckes, fortyish, an elementary-school teacher in Maryland and for 15 years a nun in the Sisters of the Holy Cross. The marriage will be his second, her first. A former Kansas City chief of police, Kelley flew to Missouri each weekend after his 1973 FBI appointment to see his wife Ruby, who died of cancer last November.

Died. Dalton Trumbo, 70, prolific screenwriter and one of the Hollywood Ten who refused to cooperate with the House Un-American Activities Committee in 1947; of heart failure; in Los Angeles. Because he would not say whether he was or ever had been a member of the Screen Writers' Guild or of the Communist Party, Trumbo served ten months in prison and was blacklisted for 13 years by Hollywood. Under pseudonyms he wrote some 30 scripts, including The Brave One, which won "Robert Rich" an Academy Award in 1957. In 1960 Trumbo wrote Exodus under his own name, following it with such hits as Hawaii and Papillon.

Died. Robert M. ("Joe") Cannon, 75, retired Army lieutenant general, who served as chief of staff to General Joseph Stilwell in the China-Burma-India theater from 1943 to 1945 and, immediately following the war, commanded a task force that disarmed the Japanese forces and destroyed their war materiel on the islands between Okinawa and Formosa; of a heart attack; in Wilton, Conn.

Died. Mao Tse-tung, 82, Chairman of the Chinese Communist Party and leader of the People's Republic of China since 1949; in Peking (see THE WORLD)

Died. Helene Berg, 92, widow of the Austrian composer Alban Berg (Wozzeck); in Vienna. Reputedly the natural daughter of Emperor Franz Joseph, Helene was devoted to her husband until his death in 1935 and then became a fierce guardian of his works. She felt she was in communion with his spirit and refused to release the nearly finished third act of his last opera, Lulu, which is usually pieced together from dialogue and Berg's music for performances. It will be presented by the Metropolitan Opera for the first time this winter.

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