Harriet Beecher Stowe reported her occupation to the 1880 census enumerators as "Authoress of Uncle Tom's Cabin."
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Unfortunately, the Census Bureau and everyone else classifying occupations will lump her in with thousands of less famous authors who didn't tell us what books they had written ...
Cool! Did she really need to specify, though? It's kind of like Henry Adams reporting "Author of The Education of Henry Adams."