A DISCOVERY OF IMPORTANT HISTORICAL DOCUMENTS, according to a Chicago paper, has recently been made among the manuscripts which were saved from the pillage of the Jesuits' College in Quebec. "It is well known by those familiar with the resources of early American history, that the publication of the Jesuit Relations, which furnish so much of interest in regard to the discovery and early exploration of the region bordering on our northern lakes, was discontinued after the year 1672. Some were known to have been written, but the manuscripts were supposed to be lost. The Relations from 1672 to 1679 inclusive, have lately been discovered, and among them a manuscript containing a full account of the voyages of Father Marquette, and of the discovery by him of the Mississippi river. It was undoubtedly this manuscript which furnished Thevenot the text of his publication in 1687, of 'The voyages and discoveries of Father Marquette and of the Sieur Joliet.' The latter kept a journal and drew a map of their route, but his canoe was upset in the falls of St. Louis, as he was descending the St. Lawrence in sight of Montreal, and he lost them with the rest of his effects. What increases the value of the present discovery is, that the original narrative goes much more into detail than the one published by Thevenot. The motive which prompted and the preparations which were made for the expedition are fully described, and no difficulty is found in tracing its route. There is also among the papers an autograph journal by Marquette, of his last voyage from the 25th of October, 1674, to the 6th of April, 1675, a month before his singular death, which occurred on the eastern shore of Lake Michigan. Also, a chart of the Mississippi drawn by himself, illustrating his travels. The one annexed to Thevenot's account, above referred to, a copy of which is contained in the third volume of Bancroft's History of the United States, is manifestly incorrect, as there is a variance between the route of the Jesuit as traced on his map, and that detailed in his text. The manuscript chart now rescued from oblivion, reconciles all discrepancies, and constitutes a most interesting historical relic." * * * * *