This is a brief summary about all the history back to the blues and jazz, I hope you enjoy it and you can learn a little bit more about culture and music. 

The spirituals are so important for the creation of blues and jazz, listen and read the next links in which you are going to find the lyrics and listen to them. 

http://www.negrospirituals.com/news-song/swing_low_sweet_chariot_swing_lo.htm

http://www.negrospirituals.com/news-song/wade_in_the_water.htm

http://www.negrospirituals.com/news-song/steal_away_to_jesus.htm

http://www.spiritualsproject.org/sweetchariot/Freedom/coded.php

http://www.eduplace.com/kids/socsci/ca/books/bkc/sources/bkc_template.jsp?name=spiritual&bk=null&state=ca