In 1865 at the close of the war, he declared that, slavery being abolished, his career as an abolitionist was ended.
He became an abolitionist in 1835, after seeing an antislavery meeting at Utica broken up by a mob.
In 1840 she married Henry Brewster Stanton (1805-1887), a lawyer and journalist, who had been a prominent abolitionist since his student days (1832-1834) in Lane Theological Seminary, and who took her on a wedding journey to London, where he was a delegate to the World's Anti-Slavery Convention.
His services as an abolitionist pioneer are recorded in Clarkson's History of the Abolition of the African Slave Trade.
She wrote much, especially for the Offering; became an ardent abolitionist and (in 1843) the friend of Whittier; left Lowell in 1846, and taught for several years, first in Illinois, and then in Beverly and Norton, Massachusetts.
The most important speeches and papers are: - The South Carolina Exposition (1828); Speech on the Force Bill (1833); Reply to Webster (1833); Speech on the Reception of Abolitionist Petitions (1836), and on the Veto Power (1842); a Disquisition on Government, and a Discourse on the Constitution and Government of the United States (1849-1850) - the last two, written a short time before his death, defend with great ability the rights of a minority under a government such as that of the United States.
An enthusiastic humanitarian on all subjects, Dr Howe was an ardent abolitionist and a member of the Free Soil party, and had played a leading part at Boston in the movements which culminated in the Civil War.
He also advocated the exclusion of abolitionist literature from the mails.
Two miles southeast of this lake, at North Elba, is the old farm of the abolitionist John Brown, which contains his grave and is much frequented by visitors.
In Congress he was one of the ablest opponents of slavery, contending particularly against the Compromise Measures of 1850,1850, but he was never technically an Abolitionist and he disapproved of the Radicalism of Garrison and his followers.