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., Statement of Responsibility: Histoire et description generale de la Nouvelle France : avec le Journal historique d'un voyage fait par ordre du roi dans l'Amérique Septentrionnale / par le P. de Charlevoix.
In the time of the flatboats and the coming of the first steamboats documented so well through the early American navigational river guides, maps clearly indicated a future problem for St. Louis and its highly praised river harbor—the city was essentially on a peninsula which could become a remote island due to floods and other naturally occurring circumstances over time. The many islands and sand bars in the river were alarming testament in early maps.
Francois Andre Michaux (1770 - 1855) was a French botanist commissioned by the French government in the early 1800's to explore the forests of the United States, Canada, and Nova Scotia. By 1810 Michaux had completed the North American Sylva, which was published in Paris from 1810 to 1813 and translated into English five years later. The Sylva is illustrated with works by Pierre Joseph Redoute
Portrait of Auguste Chouteau, one of the founders of the city of St. Louis, by Josef Francisco Xavier de Salazar y Mendoza, after 1784, oil on canvas, 35 inches by 27.5 inches