Mulock, Sir William, 1844-1944, Canadian statesman and jurist, b. Ontario. A lawyer, he served (1882-1905) as a Liberal in the House of Commons. As postmaster general (1896-1905) in Wilfrid Laurier's cabinet, he was responsible for securing (1898) the adoption of penny postage within the British Empire, and in 1900 he became minister of labor. In 1905 he became chief justice of the exchequer division of Canada's supreme court. From 1923 to 1936 he was chief justice of Ontario. He was (1924-44) chancellor of the Univ. of Toronto. His longevity and his distinguished career won for him the title "Canada's grand old man." He was knighted in 1902.