Early Voyages of Discovery--Sir Humphrey Gilbert--Walter Raleigh--Expedition of Amadas and Barlow--They land on Wocokon Island--Return to England--The New Country named Virginia--Grenville's Expedition--Colony of Roanoke--Lane, Governor--The Colony abandoned--Tobacco--Grenville returns to Virginia--Leaves a small Colony at Roanoke--Sir Walter Raleigh...