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Ancestry.com. Twenty-two years a slave, and forty years a freeman [webbaserad databas]. Provo, UT: Ancestry.com Operations Inc, 2004.
Originaldata: Steward, Austin,. Twenty-two years a slave, and forty years a freeman : embracing a correspondence of several years, while president of Wilberforce Colony, London, Canada West. Rochester, N.Y.: W. Alling, 1857.