Europeans are indebted for their first knowledge of the existence of the vast country which now bears the name of Australia, to the enterprise of Spain and Holland, when these nations were at the head of the world's commerce, two centuries and a half ago. In 1607, Luis de Torres, who was sent out by the Spanish government on a voyage of discovery, passed through the straits which still bear his name, and which separate New Guinea from the greater continent of Australia; but he was not aware of its vast extent, and merely concluded that the coasts along which he sailed were those of a group of islands. Just about the same time, the Dutch explored the eastern shores of what has since been termed the Gulf of Carpentaria; and their knowledge of Australia was extended by subsequent voyagers, of whom the chief was Abel Tasman. In 1642, he discovered Van Diemen's Land, which was long supposed to be a part of the great continent named by the Dutch New Holland--the Australia of modern times. Known as Tasmania, Van Diemen's Land now immortalizes the great sea-captain. But these discoveries led to no immediate results of importance; and for upwards of a century New Holland was laid down, in charts and maps, as a region whose coasts were not defined, and whose interior was utterly unknown. Early in the reign of George the Third a noble spirit of enterprise animated the British government. Voyages of discovery were undertaken in the Southern Seas, under Captains Wallace, Carteret, and others; and at length the celebrated Captain Cook may be said to have retrieved a new world from romance and fable, and to have made it over to England and to the best interests of mankind.