We have arrived at the “end of the parish”. Here, the slow flow of water from the Saint-François River has favored the creation of channels separating portions of the territory into islands. Between the main channel of the river and Baie Saint-François which is located about 2 kilometers further west, the Laverdure channel created Île Saint-Jean.
We go back to the beginnings of New France to find the first title deeds made to people of European origin on this portion of territory:
'Before becoming the property of Jean Crevier, in 1673, the seigneury of Saint- François had belonged first to the Lauzon family (1635), then to Pierre Boucher (1662). Originally, it was included in the seigniory of La Citière granted to François de Lauzon on January 15, 1635.” (CHARLAND, 1942.)
Despite this succession of owners, the founding act serving as the starting point for the historical chronology is the acquisition of the seigniory by Jean Crevier in 1673.
Crevier was the first lord to live there and grant land to encourage its settlement. Moreover, even if his mansion was located on the other shore, it is undoubtedly in his honor that the island of Saint-Jean bears his first name.
One of the first concessionaires of Île Saint-Jean, Laurent Philippe, dit Lafontaine Outaouais, had succeeded in erecting many constructions on his land: dwelling house, bakery, shed, dairy, barn, chicken coop and stable.
In 1683, the latter was granted the seigneury of Pierreville, located upstream from the seigneury of Saint-François.
Even if he made no establishment or concessions there, Laurent Philippe could now bear the title of lord. The prosperity that this individual seemed to enjoy probably explains why his name appears on old maps, next to the name of Crevier.