La Salle on the other hand, believing a story told him by the Senecas, held that the road sought lay to the southwest, and it is practically agreed today that he passed from near Grand River across Lake Erie southward, and entered the stream which was later known as the Ohio, and passed down this waterway perhaps to the present site of Louisville, Kentucky. If modern scholarship in this case is correct, La Salle was the discoverer of the sweeping Ohio, having come to it over the Lake Erie-Rivière aux Boeufs portage, or the Lake Erie-Chautauqua portage. There is little reason to believe he ascended the Cuyahoga and descended the Tuscarawas and Muskingum as has been feebly asserted. The Ohio, if it was at this time actually discovered by La Salle, remained almost unknown for nearly a century. In 1672 Frontenac detailed Joliet to make the discovery of the Mississippi and the adventurer went westward to Mackinaw where he met Marquette. The two went down Green Bay, up the Fox, and across the portage to the Wisconsin; on June 17, 1673, they entered the Mississippi River. Returning, they ascended the Illinois and (probably) the Kankakee; crossing the portage to the St. Joseph they were again afloat on Lake Michigan. The indomitable La Salle built a vessel of sixty tons on Lake Erie in 1679--the "Griffin," first craft of her kind "that ever sailed our inland seas above Lake Ontario." In her La Salle was to sail to near the Mississippi; part of this ship's cargo comprised anchors and tackling for a boat in which the explorer would descend the Mississippi and reach the West Indies. The "Griffin" was lost, but her builder pushed on undismayed to the valley of the Illinois River. Late in 1679 he built Fort Miamis at the mouth of the St. Joseph, and in December he passed up that river and over the portage to the Kankakee which Joliet and Marquette had traversed six years before. "Passing places soon to become memorable in western annals ... he finally stopped at a point just below the [Peoria] lake and began a fortification. He gave to this fort a name that, better than anything else, marks the desperate condition of his affairs. Hitherto he had refused to believe that the "Griffin" was lost--the vessel that he had strained his resources to build, and freighted with his fortunes.... But as hope of her safety grew faint, he named his fort _Crèvecoeur_--'Broken Heart.'"[10] Leaving here his thirty men under Tonty to build a new boat, and sending Hennepin to the Upper Mississippi, the indomitable hero set out for Canada to secure additional material for his new boat. Ascending the Kankakee he crossed the portage to the western extremity of Lake Erie and passed on through the lakes to Niagara.