Which movement was lead by the poet who is included among those David S. Reynolds is an expert on?
David S. Reynolds: David S. Reynolds (born 1948) is an American literary critic, biographer, and historian noted for his writings on American literature and culture. David S. Reynolds:  He is the author or editor of fifteen books, and an expert on the Civil War era—including figures such as Walt Whitman, Abraham Lincoln, Herman Melville, Nathaniel Hawthorne, Edgar Allan Poe, Ralph Waldo Emerson, Henry David Thoreau, Emily Dickinson, Harriet Beecher Stowe, George Lippard, and John Brown. Ralph Waldo Emerson: Ralph Waldo Emerson (May 25, 1803 – April 27, 1882) was an American essayist, lecturer, and poet who led the transcendentalist movement of the mid-19th century.
transcendentalist