1772 - Chicago is Settled by Jean DuSable 1776 - Lemuel Haynes Helps Lay the Foundation for Abolition 1791 - The First Black Man of Science, Benjamin Banneker, Surveys Washington, D.C. 1821 - African Grove Theatre Founded in New York. 1822 - Denmark Vesey and the Slave Revolts 1823 - Legendary Mountain Man James Beckwourth Enters the Rockies 1849 - Harriet Tubman Uses Underground Railroad to Become Free