Engaged. Edward Mezvinsky, 38, recently divorced Democratic Representative from Iowa and a junior member of the House Judiciary Committee that reported three articles of impeachment against former President Nixon; and Marjorie Sue Margolies, thirtyish, a reporter for NBC-TV News. It will be the first marriage for Margolies, who has two adopted daughters, one from Korea and one from Viet Nam; the second for Mezvinsky, the father of four daughters. The couple plan an October wedding.

Died. Julian ("Cannonball") Adderley, 46, lyrical, driving jazz saxophonist; of a heart attack, 25 days after suffering a paralyzing stroke on his way to a gig; in Gary, Ind. Son of a Florida musician who weaned him on jazz, Adderley arrived in New York in 1955 with a quintet that included his brother Nat on the cornet. First billed as the heir apparent to Altoist Charlie ("Bird") Parker, Adderley became more eclectic as he forged his own musical identity with Miles Davis' group from 1957-59 and later with his own revived quintet. His playful bantering with audiences and brilliant improvisations on such numbers as This Here and Mercy, mercy, mercy made Adderley's group one of the most successful in jazz. "God smiles on certain individuals," he once told an interviewer, "and they get the privilege to have certain beautiful, artistic vibrations pass through them."

Died. Sir Peter Daubeny, 54, British impresario; of a brain tumor; in London. Trained as an actor, Daubeny found his stage career shattered when he lost his left arm at Salerno during World War II. He rebounded as a promoter-organizer, touring Europe, Asia and the U.S. to recruit troupes such as the Moscow Art Theater, Bertolt Brecht's Berliner Ensemble and the Martha Graham Dance Company for performances in England. In 1964 he founded the World Theater Season, which brought foreign companies to the Aldwych Theater (London home of the Royal Shakespeare Company) every spring for a decade. Two years ago Daubeny won a knighthood for his services to the British theater.

Died. James Jewell, 69, early radio producerdirector; of a heart attack; in Chicago. While working for WXYZ in Detroit during the 1930s, Jewell produced, wrote and directed both the early Lone Ranger series and The Green Hornet. Kee-Mo-Sah-Bee, Tonto's greeting to the masked Ranger, derived from the name of a boys' camp owned by Jewell's father-in-law. Jewell's later credits include The Black Ace and Jack Armstrong, the All-American Boy, a long-running saga that exhorted teen-agers to eat Wheaties.

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