In 1668, several Sulpicians went away to evangelize the Native People: the Iroquois in the Bay of Quinte, north of Lake Ontario, the Mi'kmaq in Acadia, the Iroquois on the present site of Ogdensburg in the State of New York and, finally, the Algonquins in Abitibi and Témiscamingue. Dollier de Casson and Brehan de Gallinée explored the region of the Great Lakes (1669), of which they made a map. In 1676 the mission of the Mountain was opened on the site of the present seminary, where M. Belmont built a fort (1685). The brandy traffic necessitated the removal of this fixed mission and in 1720 it was transferred to Lac-des-Deux-Montagnes.