Stowe provides further details about her story based on actual events in A Key to Uncle Tom’s Cabin.
Chapter 22 & 23:
In Chapter IX of A Key to Uncle Tom’s Cabin, Stowe shows the distinct differences between Augustine St. Clare and twin brother Alfred. She notes that they “represent two classes of men which are to be found in all countries.” These classes being, aristocratic and democratic. Stowe states that “the aristocrat by position is not always the aristocrat by nature, and vice versa; but the aristocrat by nature…is entirely insensible to the wants and sufferings, and common humanity of those of whom he considers the lower orders.” These two characters can be seen in Augustine and Alfred. Stowe wanted to represent the multi-faceted nature of Southern slaveholders.
The full story of this connection can be read in Chapter IX, “St. Clare” of A Key to Uncle Tom’s Cabin.