1744 Bellin Charlevoix Map of the Great Lakes (a seminal map)

An iconic and historically influential 1744 map of the Great Lakes by Jacques-Nicholas Bellin. Possibly Bellin's most important production, this is the earliest obtainable map, preceded only by a 1742 proof noted by Kershaw, to depict the four fictive islands in Lake Superior (Philippeux, Pontchartrain, Maurepas, and St. Anne) - islands that nonetheless significantly influenced the structuring of post-Revolutionary War borders between British Canada and the fledgling United States. It is also notable for being among the earliest maps to identify Detroit and the Port of Chicago. Bellin's map covers all five Great Lakes and their adjacent drainage systems in considerable detail, noting known fortifications, American Indian villages, missions, and some speculative topography (particularly in Michigan).

Bellin prepared this map to illustrate Pierre François Xavier de Charlevoix's Histoire et description generale de la Nouvelle France, however it is primarily based upon the manuscripts compiled by Gaspard-Joseph Chaussegros de Lery, a French Canadian military engineer active throughout the Great Lakes region in the early 18th century. Charlevoix himself was a Jesuit missionary and traveler commissioned by the French Crown and the Duke of Orleans to reconnoiter French holdings in the Americas. The French had just lost control of the Hudson Bay and were actively in search of a profitable route to the Pacific, which many believed lay in the network of rivers and lakes to the west of the Great Lakes. Charlevoix thus had the secondary commission to 'inquire about the Western Sea, but [to] still give the impression of being no more than a traveler or missionary.'

It was Charlevoix who invented the four spurious islands in Lake Superior, here noted as Philippeaux, Pontchartrain, Maurepas, and St. Anne. The islands were intended to honor Charlevoix' s personal patron, the Count of Maurepas, Jean-Frederic Phelypeaux. The largest of the three islands, Philippeaux, is named directly after the count. The second largest island, Pontchartrain, refers to Phelypeaux's family estate. The third island, which may in fact be a mismapping of the factual State Islands, is named after the count's seat, Maurepas. The fourth and smallest of the islands, St. Anne, references the count's patron saint. Charlevoix described the islands as being rich in minerals leading numerous explorers to search for them in vain. Bellin dutifully introduced the four islands to his map, offered here, and such was his influence that they were subsequently copied by most subsequent cartographers, including John Mitchell in his seminal 1755 wall map of North America. The highly regarded Mitchell map was used in negotiating the 1783 Treaty of Paris that formally concluded the American Revolutionary War. Therein, the apocryphal Philippeaux was assigned as a marker for the new United States - British America border thus setting the stage, as one might image, for later political strife.

Charlevoix's history and this map in particular thus proved exceptionally influential as one of the most comprehensive works on North America predating the French and Indian War. Copies of the Histoire et description generale were to be found in the libraries of many 18th century luminaries, including Voltaire, Franklin, and Jefferson. Jefferson in particular admired Charlevoix work, calling it 'a particularly useful species of reading' and no doubt influenced his decision to pursue the historic 1802 Louisiana Purchase, possibly the most significant event in the post-colonial history of North America.