French trading post on the lower St. Lawrence, built about 1733, fifteen miles above Mécatina. Concession of Montagamiou was granted by Hocquart in 1733 to Lafontaine de Belcour for nine years. In 1761 Governor Murray granted to Lafontaine permission to operate this post and outposts. In 1764 Jacques De la Fontaine sold the post to Alexander McKenzie and John Lymburner. It is mentioned on Bougainville's list 1757.