Here, Dreuillettes learned much of the Unknown from an old Nipissing chief. He heard of six overland routes to the bay of the North, whence came such store of peltry.[3] He, too, like the two Frenchmen from Green Bay, heard of wandering tribes who had no settled lodge like the Hurons and Iroquois, but lived by the chase,--Crees and Sioux and Assiniboines of the prairie, at constant war round a lake called "Ouinipegouek." [Illustration: A Cree brave, with the wampum string.] By one of those curious coincidences of destiny which mark the lives of nations and men, the young Frenchman who had gone with the Jesuit, Dreuillettes, to Lake Nipissing when the other Frenchmen turned back, was Medard Chouart Groseillers, the fur trader married to Radisson's widowed sister, Marguerite.[4] When Radisson came back from Onondaga, he found his brother-in-law, Groseillers, at Three Rivers, with ambitious designs of exploration in the unknown land of which he had heard at Green Bay and on Lake Nipissing. Jacques Cartier had discovered only one great river, had laid the foundations of only one small province; Champlain had only made the circuit of the St. Lawrence, the Ottawa, and the Great Lakes; but here was a country--if the Indians spoke the truth--greater than all the empires of Europe together, a country bounded only by three great seas, the Sea of the North, the Sea of the South, and the Sea of Japan, a country so vast as to stagger the utmost conception of little New France. It was unnecessary for Groseillers to say more. The ambition of young Radisson took fire. Long ago, when a captive among the Mohawks, he had cherished boyish dreams that it was to be his "destiny to discover many wild nations"; and here was that destiny opening the door for him, pointing the way, beckoning to the toils and dangers and glories of the discoverer's life. Radisson had been tortured among the Mohawks and besieged among the Onondagas. Groseillers had been among the Huron missions that were destroyed and among the Algonquin canoes that were attacked. Both explorers knew what perils awaited them; but what youthful blood ever chilled at prospect of danger when a single _coup_ might win both wealth and fame? Radisson had not been home one month; but he had no sooner heard the plan than he "longed to see himself in a boat."