Plato was a 19th century author and teacher of African American and Native American descent (possibly of Algonquin heritage), who lived and wrote in Hartford. She was the second woman of color in the United States to publish a book, and the first to publish a book of essays and poems, titled Essays: Including Biographies and Miscellaneous Pieces, in Prose and Poetry (1841). A copy of this book is part of the Hartford History Center's collection. Plato taught at the Free African Schools, organized by the Talcott Street Congregational Church, which she was a member of from 1840 until 1847. Her copy of the 1842 Talcott Street Congregational Church Catalogue, which she signed and wrote names of omitted members, is part of the Hartford History Center's collection. She was most likely the eldest daughter of Henry and Deborah Plato. In the 1828 Hartford City Directory, Henry Plato was listed as a laborer and Deborah Plato was listed as a seamstress, living at 23 Elm Street.