Career
He represented Lowell, Massachusetts in the Massachusetts House of Representatives in 1837, and in 1852 represented Fitchburg. He served in the Massachusetts Senate representing Middlesex in 1840 and Worcester District in 1854. Mansur was born in Pembroke, New Hampshire, the son of Aaron Mansur and Rebecca Warren.
He studied at Phillips Academy and graduated from Harvard College and Law School in 1831.
He later settled in Fitchburg, Massachusetts, where he owned a textile mill. Mansur also held local office, ran unsuccessfully for United States Congress in 1842, and ran unsuccessfully for statewide office on the Democratic ticket in 1860.
In the early 1860s Mansur moved to Michigan, and in 1863 owned the Kalamazoo Gazette. He later lived in Sandwich, Ontario and Lennoxville, Quebec, before returning to Massachusetts where he lived in Duxbury and Milton.
He died in Hyde Park in February 1892.
