William Janszoon Bleau, Americae nova Tabula (1635)
This Dutch map shows the general European conception of America at the end of the first third of the seventeenth century. the shape of the coast and the place names on boththe Atlantic and Pacific coasts are Spanish in origin; to these, Blaeu has added the English names given by the roanoke colonists to'Virginia" and by Frobisher, Davis and Hudson to the far north. In addition, he has added the French names in Florida and along the St. Lawrence.
From the De Soto expedition (1549-63), geographes believed that there was a range of mountains running east and west above the Gulf, something which, had it been true, would have seriously limited the extent of the Mississippi River basin. Similarly, although Champlain had explored theOttawa River, had reached Lake Huron, and had heard reports of other lakes from the Indians, the Great Lakes System does not yet appear on the Bleau map.