All of Charlevoix's letters from North America, 1721-1722.
Letters to the Dutchess of Lesdiguieres: giving an account of a voyage to Canada, and travels through that vast country, and Louisiana, to the Gulf of Mexico : undertaken by order of the present King of France
Charlevoix first came to New France to teach at the Jesuit College at Québec 1705-09, and returned a decade later. In 1721-22 he traveled through the Great Lakes, across Wisconsin, and down the Mississippi to New Orleans. His careful observations in letters home during that trip also became part of his 3-volume Histoire et Description Générale de la Nouvelle France, published in 1744.