High words marked the interview of Frontenac and Perrot, and as a result the latter found himself a prisoner in Château St. Louis. In due time he was brought before the sovereign council and convicted of obstructing the King's justice. He was confined for almost a year, and then, as the priests also joined in protest against the autocratic governance of Frontenac, it was judged prudent to refer the matter to the King. Perrot was accordingly taken from prison and shipped to France for a new trial. The result, however, was the vindication of Frontenac, both Louis and Colbert being determined to uphold the royal authority. Perrot was sentenced to three weeks in the Bastile, after which he tendered submission to Frontenac, and was again commissioned Governor of Montreal. Henceforth friendship took the place of enmity, and the two governors now conspired to patronise the _coureurs de bois_. These were halcyon days for the picturesque banditti, whose periodical visits disturbed the wonted calm of the saintly city. The inhabitants shut themselves up in their houses while these bacchanals ran riot in the streets, bedecked in French and Indian finery, and making hideous both day and night with their ribald _chansons_. Yet even these roystering forest rovers were destined to bear a part in building up French empire in the West. The _coureurs de bois_ were in fact the most intrepid explorers of New France, and their rovings were turned to account under the tactful guidance of Talon. Talon's aim was to occupy the interior of the continent, control the rivers which watered it, and hold this vast forest domain for France against all other nations; and for this Imperial work he enrolled the daring Jesuit priests and the adventurous fur-traders. His chief reliance, however, was upon those Frenchmen whose civilised _ennui_ had driven them to the restless life of the woods. In the pursuit of this "forward" policy, the Jesuits had already established missions on Manatoulin Island, at Sault Ste. Marie, at Michillimackinac, at La Pointe on the western end of Lake Superior, and at Green Bay near the foot of Lake Michigan. These remote posts were visited from time to time by Indians from the far west, who brought news of a great river flowing southwards. Talon's enthusiasm for enterprise in the unknown west was doubled by the report, and he forthwith despatched an expedition under the leadership of Joliet and Père Marquette to take possession of the Father of Waters.