100 YEARS AGO Crescent, Jan. 18,1873.The Wisconsin Historical Society will celebrate the 200th anniversary of the discovery of the Mississippi by Pere Marquette and Joliet, at Prairie du Chien. on the 17th and 18th of June next. To make ready, they have preparations made six months in advance. — Reprint from the Rock County Recorder.An unfortunate selection of time, inasmuch as the State Editorial Association is to assemble at La Cross June 17th. and many Editors would be pleased to attend the Historical Society’s celebration, (Editorial note: The celebration fell on the dates recorded by the two men as the ones on which they first beheld the “big river.” known before 1673 only to the Indians. Father Marquette and Joliet — or Joliiet — made their journey by way of Green Bay and the Fox River to the portage at the present city of Portage and then traveled the Wisconsin River to the Mississippi.)