books.google.ca - Hemp, Cannabis sativa, has been called the world's most versatile plant. Materials made from hemp fiber have been discovered in tombs dating back to 7000 B.C. During the Middle Ages hemp was used to treat fevers, insomnia, and malaria. Columbus's ships had sails of hemp, and during colonial times it...http://books.google.ca/books/about/The_Great_Book_of_Hemp.html?id=Qq-A4A0KB0kC&utm_source=gb-gplus-shareThe Great Book of Hemp
