Recherche dans la collection - A map of all the conceded and surveyed country to the north of the rivers St. Lawrence & Ottawa lying between the head of the Grenville Canal and the River St. Maurice. Exhibiting also the line of route, in strong black, of a party employed in Septr. Octr. & Novr. 1830, to trace a new Grand Road through the back settlement...Messrs. Pothier de Rocheblave & Larocque... Quebec 25th. September 1831. [cartographic material]