Portland, William Henry Cavendish Bentinck, 3d duke of
Portland, William Henry Cavendish Bentinck,
3d duke of, 1738–1809, British statesman; great-grandson of the 1st earl of Portland . He was lord lieutenant of Ireland (1782) and nominal head of the coalition ministry (1783) dominated by Charles James Fox and Lord North . When the French Revolution shocked the British into passing severe laws against agitators, Portland, as home secretary (1794–1801) under William Pitt , administered them. He promoted the parliamentary union (1800) of Ireland with England and was again—and uneventfully—prime minister from 1807 to 1809.
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