Why did Douglass add the appendix to his narrative?

What did Marcus Cato do? When US entered the war in Europe where did it first attack? What did Americans mean by the concept of manifest destiny? How did pilgrims affect the history of the US? What tone does Douglass use when he describes Mrs Auld? How do you think people of other nations viewed the idea of manifest destiny? How is aphorism used in the Declaration of Independence? Was Columbus a failure? Write an essay on the Elizabethan Theater? How did Japan's government change after World War 2? What date were the intolerable acts passed by parliament? What has the British soldier been told to expect in New York and who probably told them? Who came first central powers or entente powers? From what Egyptian symbol did the letter K develop? What is Mecca's modern day name? What was mesopotamia trade routes? How did native groups respond to French colonization of indochina? How do you hold a ice hockey stick? What causes a dog to become angry? Who was the Union General who captured atlanta and marched to Savannah?

Why did Douglass add the appendix to his narrative?