Duff, Sir Lyman Poore, 1865–1955, Canadian jurist, b. Ontario. A lawyer and judge in British Columbia, he was appointed a judge of the Supreme Court of Canada in 1906, and in 1933 he became chief justice, serving until his retirement in 1944. He was chairman (1931–32) of the Royal Commission on Transportation (popularly called the Duff Commission) appointed to inquire into railroad problems in Canada, and twice (1931, 1943) he was administrator of the government of Canada. He was knighted in 1934.
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