How did men like William Lloyd Garrison, Reverend Lovejoy, and Fredrick Douglass participate in the abolitionist movement?

William Lloyd Garrison was an American abolitionist who published a newspaper called The Liberator which was an abolitionist piece of literature and kept on publishing until the end of slavery. Reverend Lovejoy or Elijah Parish Lovejoy was a reverend who published anti-slavery articles in various newspapers. He also started an abolitionist paper called the Alton Observer. Frederick Douglass was a leader of the abolitionist movement who had escaped from slavery and was a great orator and wrote very important antislavery writing.