E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Uncle Tom.
A negro slave, noted for his fidelity, piety, and the faithful discharge of all his duties. Being sold, he has to submit to the most revolting cruelties. (Mrs. Beecher Stewe: Uncle Toms Cabin.)
1
This tale was founded on the story of Josiah Henson (1787), told to Mrs. Stowe by Henson himself.