Of the few women who managed to leave a historical trace, usually from wealthier castes, a great number turn out to have been single, or, at the very least, single for the period during which they carved out space for themselves in the remembered world. Writers and artists, including painter Mary Cassatt, poets Emily Dickinson and Christina Rossetti, novelists Anne and Emily Bronte, Willa Cather, Catharine Maria Sedgwick, and prolific African-American writer Pauline Hopkins, never married. Many of the women who broke barriers in medicine, including doctors Elizabeth and Emily Blackwell and nurses Florence Nightingale, Clara Barton, and Dorothea Dix, remained single. Social reformers including Jane Addams, Susan B. Anthony, Frances Willard, Alice Paul, Mary Grew, and Dorothy Height, and educators like Catharine Beecher and Mary Lyon--none had husbands.