Mary Ann Shadd (Cary) (1823-1893)
Born in Wilmington, Delaware, Mary Ann Shadd became a prominent activist in the Underground Railroad refugee communities of Upper Canada during the 1850s. Arriving in 1851, she taught refugee children and urged skilled Blacks to seek haven in Canada from the increasingly dangerous conditions in the United States. In 1853, Shadd established the Provincial Freeman, an influential newspaper which encouraged self-reliance and argued for the rights of Blacks and women. The paper waged war on slavery and bigotry, becoming the leading voice of the refugees in Canada.
Plaque via Alan L. Brown's site Ontario Plaques. Full page here.