Stowe provides further details about her story based on actual events in A Key to Uncle Tom’s Cabin.
The character of George Harris is partly based on the life of Lewis Clark. Lewis Clark relayed his life story directly to Harriet Beecher Stowe. There are many similarities between Clark and George Harris. Clark was the kind of man that would sacrifice for the betterment of his family, the same way George fights to protect his throughout the story of Uncle Tom’s Cabin, especially this chapter.
The full story of this connection can be read in Chapter IV, “George Harris” of A Key to Uncle Tom’s Cabin.