...g on the Mississippi above the mouth of the Wisconsin......1719 De Lignery makes a treaty with the Sacs, Foxes, and Winnebagoes, by which the French may cross Wisconsin to trade with the Sioux on Lake Pepin ......June 7, 1726 Cardinell, a French soldier, and his wife, settle at Prairie du Chien......1726 Fort Beauharnois, on Lake Pepin, established by the French, with Sieur de la Perriere as com...