Who invented uncle toms cabin?

When Tom refuses to tell Legree where Cassy and Emmeline have gone, Legree orders his overseers to kill Tom. As Tom is dying, he forgives the overseers who savagely beat him. Humbled by the character of the man they have killed, both men become Christians. Very shortly before Tom's death, George Shelby (Arthur Shelby's son) arrives to buy Tom's freedom, but finds he is too late.