But as yet they had no claim on the Island of Montreal. As we have learned, this had been ceded to M. de la Chaussée in 1636 and transferred to M. de Lauson in 1638, who had become the intendant of Dauphigny where he was now residing. With daring boldness M. de la Dauversière and M. de Fancamp, journeyed to Vienne in Dauphigny to arrange terms with him for the cession of the island to them. De Lauson had not colonized it, or carried out any of the conditions requiring its being tilled, but he was not easily disposed to relinquish what was a valuable possession for the advancement of his family, the more so as he learned that his interests were jeopardized by the new company. He therefore refused to discuss the question.
A second attempt and visit were made, this time with success, for M. de la Dauversière had secured in the meantime the powerful co-operation of Father Charles Lalemant, who had been the first Jesuit superior of the Canadian missions, having been sent out in 1621.
Lalemant knew Canada well and had great influence with the Company of the Hundred Associates. He had been superior of the church of Notre Dame de Recouvrance in Quebec, as well as Champlain's confessor, and had had naturally many official relations with M. de Lauson in his capacity as intendant of the company. As he was held in great esteem by M. de Lauson, Father Lalemant, who since his return from Canada two years before was now the procurator of the missions of the society, was a powerful advocate for the cession.
Accordingly the cession was granted by deed dated Vienne, August 7, 1640, to Pierre Chevrier, écuyer, Sieur de Fancamp, and Jérome de Royer, Sieur de la Dauversière. This declares "that M. Jean de Lauson cedes, has given and transferred, purely and simply the Island of Montreal, situated on the River St. Lawrence, above Lake St. Peter, entirely as it was given by the gentlemen of the Company of New France to M. de la Chaussée for them and theirs to enjoy, having regard to the same duties and conditions expressed in the act of the fifteenth of January, 1636."
A second contract was signed, the same afternoon, by which "M. de Lauson as much in his own name as the legitimate administrator for Francis de Lauson, écuyer, Sieur de Lyrée, his son, yields to them the right of navigation and passage on all the extent of the River St. Lawrence as well as the right of fishing in this river, within ten leagues around the Island of Montreal and that in consideration of the great number of men which they are to cause to pass into this island to people the colony and to aid to till the lands adjoining those of the said Sieur de Lyrée, with the duty of giving him each year six pounds of fish, as a token of simple acknowledgment."