Médard Chouart des Groseilliers (born 1618) was a French explorer and fur trader in Canada. He is often paired with his brother-in-law Pierre-Esprit Radisson, who was about 20 years younger. The pair worked together in fur trading and exploration. Their decision to enter British service led to the foundation of the Hudson's Bay Company in 1670. This company established trading posts and extensive relations with the First Nations in western Canada. It was highly influential in making the region amenable to British colonization. Radisson, with Groseiliers, also mapped many of the Great Lakes and trading routes used by settlers. (From Wikipedia)
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Filed under: Des Groseilliers, Médard Chouart, sieur, 1618-1696![[Info]](https://onlinebooks.library.upenn.edu/info.gif)
Caesars of the Wilderness: Médard Chouart, Sieur des Groseilliers and Pierre Esprit Radisson, 1618-1710 (New York and London: D. Appleton-Century Co., c1943), by Grace Lee Nute (page images at HathiTrust)
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Chouart et Radisson; odyssée de deux Canadiens-Français au XVIIe siècle (Typ. Laflamme & Proulx, 1910), by N.-E. Dionne (page images at HathiTrust; US access only)- Caesars of the wilderness : Médard Chouart, Sieur des Groseilliers and Pierre Esprit Radisson, 1618-1710 (D. Appleton-Century, 1943), by Grace Lee Nute, Earl W. De La Vergne, and American Historical Association (page images at HathiTrust)