The Visits of the Northmen to the New World--The Indians and Mound Builders--Christopher Columbus--His Discovery of America--Amerigo Vespucci--John Cabot--_Spanish Explorers_--Balboa--His Discovery of the Pacific--Magellan--Ponce de Leon--De Narvaez--De Soto--Menendez --_French Explorers_--Verrazzani--Cartier--Ribault--Laudonniere--Champla...