Cornell moved to Minneapolis, Minnesota, in 1854. Cornell served in the Minnesota House of Representatives from District 5 from 1861 to 1862 and in 1865. Cornell was elected Minnesota Attorney General in 1867 and was reelected twice, serving three terms from January 10, 1868, to January 9, 1874. Cornell was elected associate justice of the Minnesota Supreme Court in November 1874 and served from January 11, 1875, until his death on May 23, 1881, in Minneapolis.[1][2]
Legacy
In an article in Minnesota Law & Politics, Cornell was named as one of the "100 most influential attorneys in state history." He was noted as a pioneering trial lawyer who "established his reputation litigating the land claims that arose out of the opening of the government reservation that occupied most of the west side of the Mississippi River at the time" and as an active abolitionist who successfully argued for the freedom of a slave woman who had been brought north to accompany her owner on a visit.[3]