557666 William Ellery Channing (engraving) by Brady, Mathew (1823-96) (after); (add.info.: William Ellery Channing (April 7, 1780 ??October 2, 1842) U.S. author and moralist, Congregationalist and, later, Unitarian clergyman. Known as the ???postle of Unitarianism, ??Channing was a leading figure in the development of New England Transcendentalism and of organized attempts in the U.S.to eliminate slavery, drunkenness, poverty, and war.); Encyclopaedia Britannica/UIG; American, out of copyright.