 Coureurs des bois, voyageurs and Catholic missionaries used river canoes to explore the interior of the North American continent.They established fur trading forts on the Great Lakes (Étienne Brûlé 1615), Hudson Bay (Radisson and Groseilliers 1659–60), Ohio River and Mississippi River (La Salle 1682), as well as the Saskatchewan River and Missouri River (de la Verendrye 1734–1738).After 1627, King Louis XIII of France allowed the Company of New France to introduced the seigneurial system and forbade settlement in New France by anyone other than Roman Catholics.