This Jesuit missionary explored the Mississippi with Louis Joliet
In 
1656 he entered the Jesuit college in Quebec City and began classical ... Jolliet's 
precise mission was to discover into what body of water the Mississippi River... [DOC] [TLE] Louis Jolliet - Student Resources in Context - Gale [PAR] When he discovered the upper Mississippi River, Louis Jolliet was accompanied 
by Father Jacques Marquette, a Jesuit missionary.