"This volume has been prepared as a companion to Clarence S. Brigham's 'History and Bibliography of American newspapers 1690-1820,' published by the American Antiquarian Society in 1947 and supplemented by a fifty-page compilation of 'Additions and Corrections' which was included in the Society's 'Proceedings' for April of 1961 and was issued, also, in separate form. (The two Brigham volumes, plus the supplement, were reprinted in 1962 by Archon Books of Hamden, Connecticut.)" -- Introduction