Material 2 

I found much material about Christopher Columbus - may be helpful -

1. http://www.u-s-history.com/pages/h1033.html

2. http://www.biography.com/articles/christopher-columbus-9254209

3. http://history.howstuffworks.com/north-american-history/christopher-columbus.htm

4. http://www.questia.com/library/encyclopedia/columbus_christopher.jsp

5. http://www.lycos.com/info/christopher-columbuscentral-america.html