American author: Sweetser was an American writer popular in her time for juvenile fiction and compilations [Wikipedia].
Lifespan: Based on available information, Kate Dickinson Sweetser lived from 1870 to 1939 [Wikipedia].
Family connection to Emily Dickinson: She was the cousin of the famous poet Emily Dickinson. They shared a common great-grandfather, Samuel Dickinson, who was a founder of Amherst College [Wikipedia].
Focus of her writings: Sweetser primarily wrote for young audiences. Her works include juvenile fiction and compilations featuring characters from classic literature [Wikipedia]. Some examples of her books are "Ten Boys from Dickens," "Ten Girls from Dickens," "Boys and Girls from Thackeray," and "Boys and Girls from George Eliot"