With numerous botanical illustrations and splendid maps by hydrographer, Jacques-Nicholas Bellin, Charlevoix represents a culmination in the middle of the eighteenth century of what the French knew, or thought they knew, about North America and its rivers and varied lands drained by them. He was sent to North America to find a route to the Pacific and through years of travel and study recommended doing this by the ascent of the Missouri River or through the establishment of posts along traditional native trading routes in Canada, through strategic stepping stones. Charlevoix and Bellin set out to prove that the Missouri and the Mississippi had basically the same headwaters, and the maps in these volumes reflect that thinking in the supposed nearness of the sources of both rivers. The Great Lakes through a vast system not only were connected to the Atlantic but to the Pacific as well. the works of the French explorers and cartographers heavily interested Thomas Jefferson. Charlevoix considered the confluence of the Missouri and Mississippi Rivers the finest in the world.