Time Line of African American History, 1852-1880 The following works were valuable sources in the compilation of this Time Line: Lerone Bennett's Before the Mayflower (Chicago: Johnson Publishing Co., 1982), W. Augustus Low and Virgil A. Clift's Encyclopedia of Black America (New York: Da Capo Press, 1984), and Harry A. Ploski and Warren Marr's The Negro Almanac (New York: Bellwether Co., 1976).