Sample of Business Letter http://www.office.xerox.com/small-business/resources/writing-effective-business-letter/enus.html
Explorers Hall of Fame http://library.thinkquest.org/4034/hall_of_fame.html
Ferdinand Magellan and the First Circumnavigation of the World http://www.mariner.org/educationalad/ageofex/magellan.php
Christopher Columbus http://www.mariner.org/educationalad/ageofex/columbus.php
Biographies of Explorers and Associated People http://www.mariner.org/educationalad/ageofex/biographies.php
Founding the American Colonies http://www.timepage.org/spl/13colony.html
Outline of 13 American Colonies http://home.earthlink.net/~gfeldmeth/colchart.html
Index of Explorers http://www.enchantedlearning.com/explorers/indexc.shtml