Mozart lived in the 18th century and Berlioz lived in the 19th century.
answer: historical reachers use scrap books, speeches, journals, letters and diaries, photograges, audio recordings, video recordings, films, archives and manuscript material, published books, newspapers and magazine clippings published at the time.
Example: Speeches: mlk’s speech. Newspaper: news in the newspaper about Rosa parks. (Thats only two but you see where I’m going)
Iago wanted to seem like a good guy, so he wanted Othello to find out himself that Desdemona is cheating.