Separated. Pierre Elliott Trudeau, 57, Prime Minister of Canada; and Margaret Sinclair Trudeau, 28, his independent wife who has recently started a career in photography; after six years of marriage, three sons (see THE WORLD). -

Died. Hampton Hawes, 48, jazz pianist and composer (All Night Session); of a brain hemorrhage; in Los Angeles. An effervescent, percussive keyboard stylist inspired by the bop artist Bud Powell, Hawes performed with many of the jazz greats, including Charlie Parker, Dexter Gordon and Jimmy Garrison. Although Hawes became addicted to heroin during the 1950s, he kicked the habit and wrote about both his addiction and his music in his autobiography, Raise Up off Me.

Died. Alfred Schild, 55, founder of the Center for Relativity Theory at the University of Texas whose work advanced understanding of such concepts as the formation of galaxies, alternative theories of gravitation, and quantum mechanics; of an apparent heart attack; in Downers Grove, Ill.

Died. Lou Gordon, 60, flamboyant Detroit television commentator whose questioning brought Governor George Romney's response that he had been "brainwashed" while visiting Viet Nam and led to his withdrawal from the 1968 Republican presidential race; of an apparent heart attack; in Bloomfield Hills, Mich. Although reviled by some for his personal abrasiveness, Gordon gained renown for his exposes of local corruption.

Died. Ethel Barrymore Colt, 65, actress-singer daughter of Ethel Barrymore; of cancer; in Manhattan. Carrying the theatrical tradition of the House of Barrymore into the ninth generation, Colt made her acting debut at 18 performing alongside her mother in Scarlet Sister Mary. A lyric soprano, she later sang in concerts, nightclubs and with several opera companies, including the New York City Opera. She toured Europe with her one-woman revue of musical theater and returned to Broadway in Harold Prince's production of Follies.

Died. Saburo Eda, 69, a founder and former vice chairman of Japan's Socialist Party; of acute hepatitis; in Tokyo. Eda hoped that Japanese socialism would create an amalgam reflecting the Soviet Union's social-security system, Britain's parliamentary democracy and the U.S. standard of living. He urged his party to de-emphasize Marxian credos like class war and nationalization. But the party became increasingly radical and Eda left it last March, hoping to form his own more moderate group.

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