Carl J. Weber and the Jacques Marquette Map Hoax

See La Conception. This name on the map was retro-fitted in the mid-19th century to the Mississippi River of the late 17th century. The narrative found at the same time also refers to the Mississippi as La Conception. The map and the narrative were mutually supporting fabrications of "La Conception" to inflate the reputation of the colonial period Jesuits among the expanding population of Catholics in the developing nation. There is no document from the 17th century with this name for the Mississippi River.
The Jesuit Mission of St. Xavier, the name of the location where Marquette was supposed to have drawn the map, is not on the map. Whoever forged the map used for the prototype of the northern region a pre-1669 Jesuit map of Lake Superior. It is an omission defying even the most flexible credulity.
The angular shape of the Mississippi, including its positioning incorrectly at the 39th degree of latitude, seems to have been pilferred from the Guillaume d'Lisle map of 1703.

Other Indications Jacques Marquette Map a Hoax