TREADWELL, Seymour Boughton, politician, born in Bridgeport, Connecticut, 1 June, 1795; died in Jackson, Michigan, 9 June, 1867. His parents removed in his infancy to Monroe county, New York, where he was educated. He taught in western New York and Ohio, and in 1830 engaged in trade in Albion, New York, where he began to attract notice as a temperance and anti-slavery advocate. He removed to Rochester in 1837, and went to Michigan in 1839 to conduct the "Michigan Freeman," an anti-slavery organ, at Jackson. He took an active part in all the conventions and movements of the Abolitionists, supporting James G. Birney for president in 1840 and 1844 and John P. Hale in 1852. In 1854 he was nominated by the Free-soil party for commissioner of the state land-office and twice elected. He acquired note, especially by a remarkable state paper in which he denied the constitutionality of the payment by the state of the expenses of the judges of the supreme court. The correctness of his views on the question was maintained by the state auditors in opposition to the attorney-general. He lived in retirement after 1859 on a farm near Jackson. He became first known to the public as the author of a work entitled "American Liberties and American Slavery Morally and Politically Illustrated" (Rochester, 1838).