XXIII. 32Human Beings and developing the Real Principle of their Increase (183o). He entered parliament in 1829 as member for Newark, and devoted his efforts to questions of social reform. He took a leading part in the agitation for the prevention of child labour in factories—he was chairman of, the committee appointed to inquire into the subject. He contested Leeds after the Reform Bill of 1832 (Aldborough, for which he had sat after Newark, being deprived of its member), but was defeated by Macaulay. In 1834 he was unsuccessful at Huddersfield, and failing health prevented any further attempts to re-enter parliament. He settled down in Belfast, where his firm had business interests, and died at New Lodge on the 29th of July 1835. See R. B. Seeley, Memoirs of M. T. Sadler (1842).