These are the links I used
www.spartacus.schoolnet.co.uk/USArunaways.htm
http://www.u-s-history.com/pages/h481.html
www.smithsonianmag.com/history-archaeology/the-great-escape-from-slavery-of-Ellen-and-william-craft.html
http://vahistorical.wordpress.com/2010/10/20/how-did-slaves-escape/
http://answers.yahoo.com/question/index?qid=20080109053454AACfUgg
www.spartacus.schoolnet.co.uk/USArunaways.htm
http://www.u-s-history.com/pages/h481.html
www.smithsonianmag.com/history-archaeology/the-great-escape-from-slavery-of-Ellen-and-william-craft.html
http://vahistorical.wordpress.com/2010/10/20/how-did-slaves-escape/
http://answers.yahoo.com/question/index?qid=20080109053454AACfUgg