From about 1876 to nearly 1896, Whitney made a number of portrait sculptures of prominent individuals. Garrison said Whitney's sculpture, "William Lloyd Garrison" (1879), was the closest likeness made of him. It is at the Massachusetts Historical Society in Boston. She depicted Alice Freeman Palmer, President of Wellesley College; economist Harriet Martineau; and suffragists Frances Willard and Whitney's cousin Lucy Stone, which is in the Boston Public Library. She also depicted Mary Tileston Hemenway, the famed philanthropist and reformer. Her sculpture of "Harriet Beecher Stowe" (1892) is at the Mark Twain House, and a bust is at the Day House, owned by the adjacent Harriet Beecher Stowe House in Hartford, Connecticut. The Uris Library at Cornell University houses the Jennie McGraw Fiske Medallion.