While based in Toronto she published and edited the anti-slavery newspaper, Provincial Freeman. The newspaper included several articles illustrating the role played by women in the emancipation struggle and argued against all forms of gender discrimination.
Cary's articles often dealt with women's suffrage and in 1871 she and sixty-three other women attempted to register to vote in Washington. Cary was also the founder of the Colored Women's Progressive Franchise Association in 1880.
In her final years Cary campaigned for training programmes for equal rights, an increase in the number of occupations open to women, co-operative stores and local labour bureaus.
Mary Ann Cary died on 5th June, 1893.
Slavery in the United States (£1.29)