She was one of the most popular writers of her day, both in the United States and in England, and was called 'the American Hemans.' Her writings were characterized by fluency, grace and quiet reflection on nature, domestic and religious life, and philanthropic questions; but they were also often sentimental, didactic and commonplace. Some of her blank verse and pictures of nature suggest Bryant. Among her most successful poems are 'Niagara' and 'Indian Names.' The latter was set to music by Natalie Merchant for the 2010 album, "Leave Your Sleep". Throughout her life, she took an active interest in philanthropic and educational work (1911 Encyclopædia Britannica). Some of her most popular work deals with Native American issues and injustices. An early advocate for social reform in slavery and emigration, as well, Sigourney felt obligated to use her position to help oppressed members of society. In her posthumously published autobiography, "Letters of Life", Sigourney stated that she wrote with the hope of 'being an instrument of good'.