Lewis Champion Chambers is one of the forgotten figures of Canadian Black history and the history of religion in Canada. Born enslaved in Maryland, Chambers purchased his freedom as a young man before moving to Canada West in 1854; there he farmed and in time served as a pastor and missionary until 1868. Between 1858 and 1867 he wrote nearly one hundred letters to the secretary of the American Missionary Association in New York, describing the progress of his work and the challenges faced by his community. Now preserved in the collections of the Amistad Research Center at Tulane University, Chambers’s letters provide a rare perspective on the everyday lives of Black settlers during a formative period in Canadian history. Hilary Neary presents Chambers’s letters, weaving into a compelling narrative his vivid accounts of ministering in forest camps and small urban churches, establishing Sabbath schools and temperance societies, combating prejudice, and offering spiritual encouragement. Chambers’s life as an American in Canada intersected with significant events in nineteenth-century Black history: manumission, the Fugitive Slave Act, the Underground Railroad, the Civil War, Emancipation, and Reconstruction. Throughout, Chambers’s fervent Christian faith highlights and reflects the pivotal role of the Black church – African Methodist Episcopal (United States) and British Methodist Episcopal (Canada) – in the lives of the once enslaved. As North Americans explore afresh their history of race and racism, A Black American Missionary in Canada elevates an important voice from the nineteenth-century Black community to deepen knowledge of Canadian history.